What weapon does every one like using while playing online?

MP44 or BAR usually

I start with sniper, and do pretty well with it. Even decent at short range. But I like to pick up someone else's gun for my secondary. Preferably shotgun.

start with carbine if playing as american usualy pick up a rifle not SCOPE scopers are fags

I say it depends on the level. Vast open levels its usually best to have a sniper rifle. I prefer a machine gun for levels with lots of buildings and close combat. It also depend how good your reflexes/aim is. A shotgun and sniper rifle will generally kill with in close combat but if you miss it takes a short time before you can fire again. I dont really like the regular rifles because they take several shots to kill and can not be fired that quickly but they can be useful as a second weapon if you choose a machine gun.