Airsoft? Psh, paintball all the way! lol.
It's entertaining is all it is. You don't want to kill anyone, you just want to get them out of the game. Think of Paintball as a highly advanced form of dodge ball =D (Except when you get hit, you change colors... and the balls are shot out of a weapon... lol)
It's fun running around in the woods trying to hide and find eachother, trying to find a strategic advantage over the other team =D
My favorite game was when I played in this big ass backyard someone had (parts were open hills, then the rest was woods in a "U" shape around the plains) It had a tower on one side within the woods, and then a 2 story old cabin on the other part of the U. It was the best. fuckin. game of paintball I played =D. (I shot someone in the face mask over the lense. He freaked out and started to shoot full auto randomly forwards. Looked fuckin' hilarious)