I applaud your honesty. And wit.ayuri said:badly
I tend to attempt to be sneaky. And then end up going for run and gun with a weapon set otherwise designed for sneaky. Which works surprisingly well. In MW2, anyway. Although I have a kill-cam dance for when I sneak up on a sniper from behind.
Aim, change weapon, change back, spin around, aim, headshot. Occasionally headshot is replaced by stab. And if the sniper is prone, the whole thing will be replaced with a pre-emptive teabagging. It's a shame that no-one watches kill-cams, really...
Halo games, I tend to alternate between heavy and sniper, with a small amount of sneaky thrown in. I just like taking out opponents who don't expect it.