How did you discover SW? [I Experience Project]

I've been on and off SW here for about 5 years or so. I discovered SW after I tried to create a new profile on EP after a lengthy hiatus. It seems that every time I come to SW there's been a major change in membership and attitude. Every time I come back it's like I'm visiting a new site. Which isn't necessarily bad, but it takes time to regain my footing!
How did you discover SW? What keeps you here?