Ah, a good question and the answer tends to define my philosophy for air gunning! So lets see, well, to begin with, I have the ability to target shoot out past 100yds on my lot, I like shooting and I really like trying to shoot for accuracy at longer ranges, but I still want to stay sub-sonic and low mass (relative to powder weapons) for added range safety; hence an airgun approach. Add to that that I do not need a permit for an airgun in MD (I do not have a firearm) and I get the fun and challenge of shooting without some of the hassles other than range safety. Range safety is very important for me; I treat all my airguns as firearms when it comes to safety.
Not that I do not like to fire powder weapons, when I get the itch to fire powder weapons, and I do occasionally, I have friends that will oblige as long as I supply the amo - if you have not shot a Barrett 0.50 (civilian version) trying to hit a target at 1,000+ yards, you should try it, its expensive ($10 or so a round), but very satisfying when you can manage to hit the target (a 2ft square target). I just can not shoot at my house, and there are no shooting ranges close by so this is how I get my shooting satisfaction; and it really is satisfaction for me - heck my wife even understands that this is one of my ways to unwind.