I got the internet back in 04-05, I believe, and I remember the first forum/community I joined was a website called
http://www.poolcomsonline.com. It's shut down now but I had a blast on that site. Basically, it was just online pool, but it had so many awesome users, tournaments, dramas, stories, everything. I was a moderator on that site, too, and since I was only 11-12 years at the time, I gotta admit, I abused my authority real good.
How about you?