Hope it's not too late to chime in...
1. what to expect
2. what to wear or not wear
3. how not to get shot (i probably should have put this first)
4. why the hell people do this in the first place :irked:
Expect everything that you hear, to be unrealistic. Paintballs do not hurt, they only sting. Well that is unless you tend to get shot from up close.
Clothes, try to not wear anything tight. Wearing tight clothes, you will expect to feel the hit a bit more. Stay on the lines of oversized clothes (paintball trick). An extra Tshirt will help, but do not go crazy as you will sweat. Dehydration is a B....
Want to avoid getting shot? Best thing to do is not try and focus on one thing or one area. Always keep your eyes open and alert to your surroundings. Believe it or not, when you see paint being shot at you, you can literally see the paintballs flying towards you. So avoid the area where they are shooting towards.
It is an adrenaline sport. Some people like jumping out of perfectly good airplanes, some people like to jump off of perfectly good cliffs. Just like anything else, it is fun to do.