Well I am not really looking at the character from an optimized standpoint (in fact, right now I'm only developing the concept, not the mechanics); my group is not big fans of super-optmization, and I like the concept. I would probably stay Hexblade longer than 3 levels because it fits my concept better, but I am not sure yet. At the least I would hold out for 4th level to get Dark Companion (option from PHBII).
As for "types" of monsters: I was thinking of him not specializing in any one monster species... there isn't any one type creature that we have fought in the campaign yet (the campaign is very open-ended.. I do not even think the DM has a storyline planned out, he gives us "quests" that we can choose to take)... here's my more in-depth summary that I developed and posted on WotC's Development forums, if it helps any:
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Basic Concept
A light melee character with a dark past who works as a bounty/monster hunter. Sort of a mix between The Punisher and Van Helsing, but focusing on all types of monsters.
Expanded Concept
Kalen Skorne is a man with a troubled past and an uncertain future. He earns a living as a sellsword and bounty hunter, using his abilities to hunt down and slay villains and monsters darker than himself that plague the world. He seems very cold, showing little compassion in the face of the usually grim tasks he has to perform, but his heart is in the right place. He's fascinated with death and misfortune. He's a little unsettling due to his no-nonsense demeanour, but has a very forceful, almost dominating, personality.
Quote
"I asked if you wanted the problem taken care of; I never asked if you agreed with my methods"
Traits
Physical
- Lots of scars on his body
- Long scar going near his right eye
- Weird eye coloration (?)
Mental
- Brooding and moody
- Obsessed with death, tragedy and misfortune of others
- Despises evil/wicked people
- Weak spot for children (who typically are fearful of him)
- Sense of honor, but questionable methods of achieving goals
- Only fights battles when necessary; doesn't provoke others and takes most insults
Appearance (Tentative)
The man seemed to ooze out of the shadows, as though he was a part of it to begin with. He was tall, a little over six feet, and well built, with broad shoulders. His face was angular, his nose hooked slightly. His head was shaved bald, but he had a jet black goatee that gave him a somewhat villainous appearance. He wore clothes of a blue so dark it was almost black; in pure darkness he might as well have been invisible to the normal eye. A strange malevolence reflected in his eyes, but subdued, as if his foul appearance was just the outer shell. Around him flickered the faintest motes of dark purple, barely noticeable, like some bare magical aura.