Used to play on Draenor (before it became cool!) and before that Stormrage for a bit. Quit a few years ago as I was just as anti social most of the time as in real life too. Took me ages to get the confidence to run instances after a few bad experiences. I never found a good guild that progressed or stayed together for more than a few months.
I played Rift for a month before I quit as I was getting addicted again, I sorta miss it a bit though, but although quite good I thought it lacked soul.