Sniper, all the time. I was pro in COD4, but I am terrible at it for the most part in MW2 due to all the fags quick scoping. I actually zoom in and hold my breath, etc, etc. I have to actual have a rifle that I like the feel to though, which is one of the reasons I was so good at it in COD4. I really like the M2... whatever it was (first sniper rifle you got). I loved the feel; I loved how it was bolt action. There was no greater satisfaction then getting a headshot and hearing / seeing another bullet getting put into the chamber, one by one. The Barrett works pretty good in MW2, but the inclusion of a thermal sight and such really ruined it for me. No skill in MW2.
I booted it up again a few months ago, and went twenty to one for a streak of about 10 games. I have still not lost my touch it seems.
Sniping in other games is a tad different. I can snipe decently in Halo, but I need people to actually back me up, so I don't get shot at. I can't no scope; at all. In KZ2 I couldn't snipe for shit. Not sure why, might have just been the feel. I did much better as a Tactician, or Sabo on there. I usually did really well sniping on BC2 (Beast modeeeee). I kinda quit after I got the M14 (or was it the M21?). There was no need for me to even have a sniper rifle.
I usually even snipe in single player games given the chance. Loved it in Borderlands, but I liked it more because of Bloodwing.
If I don't snipe, I usually like classes with SMGs, quick weapons. If it's a game with no guns, same thing. I like fast, quick characters. I just find it more amusing.
I really feel like playing BC2 or COD4 now...
I really can't wait to see what EA does with the guys from Infinity Ward, or what the reconstructed team does. They really fucked over Snipers in MW2, and Black Ops (Although, they did potentially snuff out quick scoping, thank god).