I love climbing, but I haven't done much of it since I moved away from the CA in '99. The rock sucks where I live now, though there is ice climbing, alpine, mountaineering galore.
All kinds of climbing is fun, but I really loved bouldering. I spent many good days running and bouldering and free soloing easy climbs (often soloed up and down Swiss Cheese, 5.3-4, 80 ft on Goat Rock in running shoes, sometimes in the rain) in Castle Rock SP. I would go by myself or with one of my climber friends who was a decent runner. We would often run into climbers like Chris Sharma, who were absolutely amazing to watch... All my close friends in the late '90s were climbers, and we always go on road trips to Pinnacles, Yosemite, the Sierras, etc. where the running was also very fun too.
Using your body to pull moves on rock is really a cool feeling, just as running is can be really cool. I topped out at around 5.11, probably because of really weak abs mostly (could probably get a lot stronger though), but I was a very comfortable near my limit, sometimes free soloing 5.9s (the high and calm that you get when doing that kind of thing is sort of addicting). My friends were all 5.12+.
There really should be a running/climbing club or scene. It would be cool to climb with Gabe Jennings, among others with similar interests. Also, climber girls are HOT with lean and strong looking bodies, not sickly thin like many runners.