So far Gamurs is my favorite social gaming site. It gives me the option to integrate Steam, Xbox, PSN, and League of Legends. Which is basically all I play. I highly recommend you join this one, and use my referral link:https://gamurs.com/?ref=c538b0bd
I JUST discovered Gamers Hive at Orlando iX this weekend. They're a fresh new local start-up and I'm giving them a shout out here because they deserve it. The website needs some tweaks to run smoothly but I have faith that they're going to rock the social gaming world in no time.
I opened a Playfire recently and while I think the platform is cool I've encountered some glitches with xbox and playstation integration that I wouldn't expect from a site that's been around as long as they have. I did read in the forums that sometimes the integration just takes a while so we'll see how things go.
Let me know in the comments if you using any social gaming sites/platforms that I haven't mentioned and I'll check them out. Thanks for reading!