Got into PCPs a few years ago, went all out on a competitive setup. Invested a lot of dough into a single rifle setup, compared to my current real guns. It still amazes me how much you could spend on high pressure air. Dead accurate and could stack pellets on top of each other all day long. Amazing while it lasted.
I would still be doing it, along with real guns BUT found airguns to a bit boring (due to it being amazingly accurate with the higher end technology). There was no challenge really, in my indoor range which brings me to my second point. Interaction with other airgunners was non existent, at least for me. I tried to find others through forums and such but seemed like others were content with enjoying the hobby by themselves.