DragonLancer said:
For the same reason that attributes should be generated randomly, because otherwise everyone is a carbon clone. Variety is the spice of life and gaming.
That might have been necessary in old edition games where the only differences between 2 fighters were their HP and their name, where it took 5 minutes to make another character when one croaked. (I heard people tell about games like this).
Nowadays, there's not only classes and ability scores, but race, skills, feats, weapon and armour choice, spells, and all that, all of which can make a character individual. Not to speak about all that personality thing some people insist on using when they roleplay. Those guys who won't stop playing their characters as if it were a real living thing instead of something we just use to kill things in a game.
All I know is that we have been using fixed HP, and point buy, and don't roll starting money, either, and no two characters of the same race/class setup were the same. In fact, they were not even close.
Umbran said:
There's also a bit of slippery-slope of rules development to consider. Assume, for the moment, that hit points by level are fixed per class. Well, might as well do that for monsters, too, right?
Already did that: I have used dozens of NPTs and monsters and all that, and I have actually rolled their HD maybe three times.
Then, there will be the pressure to make damage a fixed thing as well (since it is measured against known hit points, this leads to more mathematically sound balancing). And, of course, there's already point-buy stats. So, now we have standardized stats, hit points, and damage. Why, precisely, would we want to keep random to-hit, saves, and skill checks? Why not just go diceless and be done with it?
At some point along the way, you realize that there is some point to randomness in the game. All that remains is a decision as to where to draw the line between fixed progressions and randomness.
So because there is a slippery slope, we should draw the line a couple of inches before the field? Everything's random? If we go that way, we might as well go 3d6, in order. The class and race are rolled from a table as well.
And, of course, we roll the monsters' stats as well now. Not every ogre mage has Str 21, for example...
The discussion can go either way, so why not find a nice plane to draw a line? Like "things to do with character creation and advancement are fixed or assigned by choice, and things that involve actual actions are rolled:
Abilities, HP, Race, Class(es), choices in class abilities, skills, feats, spell selection - all this belongs to the realm of character creation/advancement (it is done once, and then doesn't change except in certain circumstances, where you deliberately change something, like sorcerer's known spells) - so it is fix: HP are something like 3/4, average rounded up, or similar; ability scores are bought with the amount of points that was agreed upon; class, race, skills and so on are the players' choice.
When you are actually playing the game (not creating characters or levelling them up), you roll the dice.