Competitive Gaming Communities

I just joined this communitya couple months ago, but before, I played nothing but fifa, and nba 2k, and a couple online shooters. Now that i know about the fighting game community, i wondered what other forums there were for gaming communities? Like, I know shooters and rpgs are pretty popular, but sports games seem to be harder to find. I just wanted to know if anybody had links to other gaming forums, whether they are a specific game or a specific genre of games. And it doesn’t only have to be sports games, cause I’m not really sure of the bigger forums for each group.

Thanks And merry christmas SRK Fam.