I like pellet guns...They can seriously aggravate a situation without altering the course of history...Plus they sting like a bitch.
I had a shitload of pellet guns as a kid, it was awesome. we outgrew our GI Joe's when my buddies sister outgrew her doll house so we had a perfect little tactical sniper training range in the back yard. We even got the cheesy ass crossman scopes on our bb guns. Next fun thing was shooting pigeons out of neighbors palm tree's, also shot the cooling fins on air conditioning units on peoples roofs from a block away, we were real shitheads growing up in phoenix.
My favorite ever was the Red ryder lever action, Scottsdale Az had some sort of weird grasshopper swarm in the mid 90's and my cousin and I spent all day shooting grasshoppers with our red ryders, so much fun.
When the airsoft stuff got big it was huge fun, they hurt like hell but you can still shoot people. its a big deal now and replacing paintball, I was in a army surplus store the other day and they were selling a airsoft gun made completely made out of REAL AR-15 upper and lower parts. You can easily spend 500 bucks on an airsoft gun.