Mostly, the characters I create tend to follow a fairly standard trend- they're usually handy in the thick of a fight, heavily armoured, and come with a repertoire of healing spells/abilities. I tend to play, depending on the game:
D&D-based games - Cleric/fighters (my favourite type), paladin/clerics, druid/rangers (I ALWAYS multi-class). For a change, however, this year I am using a rogue/sorcerer.
Diablo 2: The paladin. Heavy armour, and the "prayer" aura makes him damn near invulnerable if you take the time to get him some decent gear and add planty of skill levels to "prayer". equipping him with "triumphant" weaponry is invaluable, too.
I always play as a human male in his early twenties (much like myself). Generally, strong, analytical and frugal with his words - again like me.