Greetings!
Interesting. Hmmm...in one campaign that I have, there is one character--Mathias--who is a Wizard. He is Lawful Evil. He conceals his alignment from the rest of the party by a layer of enchantments that conceal everything about his personality and so on. He is an interesting character.
Mathias is 6'6" and weighs approximately 268-lbs. He is broad shouldered, and in rugged physical condition. He has shoulder length coal black hair, and pale, grey-blue eyes. He wears a full beard, that he keeps neatly trimmed. He wears the best fashion of clothing, very stylish, and finely tailored. Mathias started out as being Lawful Nuetral, but has drifted to being Lawful Evil. Mathias is a powerful Wizard, and he has several very powerful magic items, including a Wand of Fire, which is crafted of a wand of black steel inlaid with gold, and has a black and gold lion head at the tip, with ruby eyes. He also has a staff that has a elephant-like foot on the bottom, and a carved elephant head at the tip. The staff has great powers of Cold, as well as Force.
Mathias the Wizard smokes a pipe of fine tobacco with his companions, and also enjoys good ale. He gets along especially well with humans and dwarves. Mathias is an excellent and very knowledgeable scholar, and assists companions with many insights of cryptic and long-forgotten knowledge. He is fanatically loyal to his friends, and has shown inspiring courage again and again in battle, fiercely throwing himself into the thick of the fighting, and even risking his own life for his comrades, even members of the group that are of Good alignment--which is just about all of them--and even people that he often times disagrees with religiously or philosophically. Despite these differences, they are members of the Company of the Black Tower, and he has given his word of honor to serve with them loyally and with courage. He is friends with many members of the group--but as mentioned, there are some members that don't often get along with him for a wide variety of different reasons. Mathias is slightly racist against elves, seeing them as weak, selfish, and too ensnared to hedonism and too undisciplined. He thinks that the elves' time has passed, and now the elves just need to get used to the idea that the humans--and the Vallorean Empire in particular--are in charge of things.
Mathias can also be callous, and he doesn't have any compassion for his enemies. He doesn't care about killing men, women, young, or old, it matters not to him. Once he believes that he is fighting against enemies, he is entirely ruthless. He can blast a whole barracks full of enemy creatures, and as they sprawl about, writhing and moaning in agony as the magical fire proceeds to burn the flesh like stacked sheets from their bodies as they gasp their last breath as their lungs burn, he can walk calmly through such grim devastation, and slowly light a fine cigar, puffing slowly as he searches for treasure or secret documents or intelligence information. Mathias doesn't expect quarter, and he doesn't offer it, unless he has been specifically instructed to take prisoners by the group's leader, who is a Paladin. Mathias respects the paladins in the group, for their religious committment, for their loyalty, discipline, skill in combat, and their ferocious zeal to wage war against the forces of Darkness!

How's that for irony?
That is just it, though. Mathias doesn't want *Evil* to triumph at all. He doesn't worship the Dark Gods, and he would gladly give his life to save his friends. He would even give his life to serve his country, and to protect his countrymen. He doesn't believe in stealing, and only rarely lies, when he feels it is necessary, or if the other person that he is talking to doesn't really deserve to know the truth about this or that. In that sense, he is generally truthful about things to his friends and those people that he respects, but to others, he determines what they need to know on a case by case basis.
Mathias isn't especially greedy, though he does desire wealth and power. He believes in having dignity, and having a proper, noble demeanor at all times. He believes in vengeance, and in blood guilt. Those who commit crimes should pay the price, and preferably the most severe possible, and painfully. Those who kill his friends, family, or indeed, anyone that he feels loyalty to, can expect a fanatical, determined Wizard to hunt them down and kill them in extremely painful ways. Mathias believes in order and discipline, and in unity. Those who cannot abide by such should feel the scourge of pain until they do learn, until they understand. Those who exalt the individual above the greater good of the society are chaotic, selfish parasites that at best, need to be watched carefully, and constantly influenced to see their need for the Ways of Discipline, Order, and Obedience. At worst, Mathias believes that they are traitors to not only the state, the glorious empire, but they embrace a philosophy that is in spiritual rebellion to the very foundations of reality. They are embracing the philosophy of Chaos, and are rebels at heart, and are therefore a danger to all that is good and holy, and should therefore be killed and eliminated from the population, so that their hateful ideologies cannot spread and infect the rest of the population. Those that are deemed to somehow be compliant enough to be given some chance for reform, can be institutionalized in special asylums where priests and doctors can work with them to get that damned Chaotic philosphy out of them. This process, of course, may take years to accomplish, and their are also dangers involved, with various magical and medical research methodologies and spells that can at times prove painful or even fatal. Alas, such is the price of progress.
At least the person can be comforted with the knoweldge that his children and younger family members that are taken away and educated properly will grow up free of the Chaotic and wicked ideologies that somehow the individual is of primary importance over the culture as a whole, and over the glorious empire that sustains and makes life possible for the whole of the citizenry. As can be imagined, he differs in method and degree in many ways from people that are otherwise Lawful Good, or Lawful Neutral, or Neutral Good, for example. Still, he has many qualities that other members of the party admire and are very appreciative of.
Mathias is generous with both his knowledge, as well as his wealth, being enthusiastic in helping other younger, less well-off members of the group, and being willing to share spells and knowledge with other wizards int he group. He is disciplined and sincere in his desires to obey the laws of the land, and in serving the glorious empire loyally. He is also a very handsome character, and can be quite charming with women. He is inspiring to men, and has demonstrated excellent leadership qualities, and commands great loyalty from his own cohorts, who have been rewarded well, and treated with dignity, discipline, and loyalty by their lord, the wizard Mathias.
Indeed, evil characters can be very complex, interesting characters that do not have to be bloodthirsty savages, running around on killing sprees, or killing their friends, or robbing their friends. Evil characters can and should often be far more complex and diverse than that. That is a simplistic caricature of what evil is, and what evil means.
It is also to interesting to note, that there are some characters in the group that are suspicious of some of Mathias' motives, or at least they have been critivcal of some of his attitudes, methods, and tactics, but at the same time, they also really like the wizard Mathias, and are respectful of him, his abilities, and his loyalty. He has proven to them to be a very interesting person, and a good companion, even if he is ruthless, harsh, and unforgiving.
Semper Fidelis,
SHARK