I know we've had threads on this in the past - it's always a good thing to consider.
I have come to the realization that while I enjoy being outside, exercise, the company of others, big views, and a challenge; I have an unusual drive that pushes me to do the climbs I do. I enjoy logistics. Organizing people and materials, planning camps and trimming gear lists down, and then watching it all come together and having my decisions validated on the peaks is really what pushes me. I've had suspicions that it was about the gear, or the maps, or the all-night drives, but I got this little tingle in the back of my brain after this weekend's climb, and the same tingle when planning some integration and test activity at work - and it clicked. This is me. This is why I do things the way I do - logistics, putting it all together and making every little aspect of the trip work out.
Questioning other's motivations is a favorite activity of climbers, and of humans in general. Just look at any Everest thread on any climbing board - the discussion is always about motives.
But, let's not bring that up here. Don't tell me why anyone else climbs - look inside and figure out why you climb, and then explain. It was a revelation when I realized why I've been doing what I have been, and that kind of honesty with one's self is good, and will let you enjoy climbing more in the future. For instance, I'm going to start aid climbing. I've been on the fence about picking it up, but it's all about logistics - I bet I'll love it, despite my general concerns about exposure. I don't really love hiking, but I bet I'll like thru-hiking, for the same reasons. I may try that someday, too.