I hate being basic and following the crowd, but climbing is just so much fun. It is the most fun activity I've done, up there with Soccer....and easily the most fun individual activity.
The reward after doing a tough route is just incredible.
As much as my comment was a bit tongue-in-cheek, I don't mean to say you shouldn't do it because it's basic ;). I've been climbing for many many years and agree that it's extremely fun and rewarding. That doesn't change with more people enjoying it (but also stay home so I can get the good routes to myself ;) ).
The reward after doing a tough route is just incredible.