gamerDNA.com

I have been using this site a lot lately. It's one of the coolest sites I've ever used. The idea behind it is fairly simple. You enter your game collection and some other information into the system, and it tries to find other games and players that match your interests. It then will follow your gameplay activities, and for some systems this following is totally automatic. The community there is also really friendly, and it is relatively spam and forum troll free. I could keep going on about why I like it, but if anyone wants to know more the best way to learn it to check it out. http://www.gamerdna.com/