Sniper/Assassin/Cornered Beast. If I have my way, you're dead before you even hear the shot. My old nickname was Panther, because I tended to pounce when I struck with melee weapons, and usually from out of nowhere. Which is quite a misnomer, seeing as I'm not panther-esque in the slightest. I'm more like a bear.
In situations where stealth is not possible, I tend to frenzy, tackling the nearest person and beating at them until they stop moving or surrender. If I've got a weapon, I wield it with no particular finesse. It may not look as cool, but I've found it's a lot scarier to have an enraged man charging at you and swinging furiously as opposed to sword flips and specific targets. In particularly rough fights, I've been known to bite.
EDIT: This applies to both Video Games and Real Life, via paintball and airsoft.