Paintball is fun... Just don't make the mistake of making one person on each team a 'medic,' in which they can get people in again who got shot. I got pinned in a small bunker with the medic, got shot at least 20 times before I just gave up. On another note, paintball is hard to play for those of us with glasses. The glasses will fog up almost immediately in the paint ball helmets and you won't be able to see anything.
Oh, and remember to always wear a neck gaurd and a cup if your a guy, since being hit feels about the same as getting suckerpunched.