I'm the "flank and then spray and pray" kind of guy. I take crazy risks to try to move the lines of battle.
In Halo, I run around with a needler or other fast firing weapon and try to ambush.
In Gears of War (annex mode), I am the guy who suicidally throws himself into a captured ring surrounded by enemies just to break their capture for a few critical seconds.
In TF2....Ok, I haven't played that much, but I tend to go scout so I can wreak havok all over the place.
In Borderlands, I am a siren that flanks enemies, or runs right at them while unleashing elemental hell with my magnums/shotgun.
.....Yeah, I'm kinda inconsistent. Sometimes I get lucky and get an impressive kill streak...but I'm usually brought down by bad timing, or silly mistakes.