I played for a few years, but haven't really persued it lately. It's a great game, but I had trouble getting any of my friends interested in playing (most of my friends are in the arts... I suppose it would be easier if I worked in science or tech). I went to a couple of go clubs, but in both cases the members took it way too seriously for me. I've played a few quick 9x9 games online, but trying to play a 1 or 2+ hour game online is downright painful.
I still like to crack open a book of go problems from time to time and work through a few.