Currently, aside from all the EZA places, namely here and Twitch, I frequent Squid Boards, a relative to Smash Boards, but for all things Splatoon. On top of that, somewhere I spend a lot of time with, is a small Discord server with some close friends of mine, who are all into gaming, so I guess that counts.
And I will pop in to check on the Escapist Forums once in a while. But that site should be going the way of GT fairly soon, I'm surprised it's even still alive. Given they are owned by Defy, I don't expect their seemingly slow site to survive, they can't be very profitable these days. I also used to be very active on the Global Trading System site, which is all about Pokemon. I may become more active there once Sun and Moon come out.