Been enjoying this thread for a while, thought I might get in on the fun/madness. I've been on OKC for around a year, was a bit skeptical at first, but I've had real success with it. I live in a small town, so there's not a ton of opportunities to meet people who are my type around here. At first I wasn't having much success no matter how many or what type of pictures I put up. After I started working on improving my profile, that's when it really started rolling. I usually have at least one date a week (of course sometimes there are drought periods) and have met a lot of cool people. The downside though, is that since I do live in a small town area, I've almost dried up the available OKC pool (there are a couple bigger cities about 20 minutes away, which is where I usually date).
Like I said, things didn't really start rolling until I got my profile on point, so those of you who are having trouble, work on that. Really, my profile is just a bunch of random shit that makes me laugh, but it gets really good response:
http://www.okcupid.com/profile/RunKtoC/