As one can imagine, I check back here once and a while to see what's new (and I've always liked smaller communities). Other than that I frequent:
Reddit (/r/games, /r/planetside, /r/truegaming, /r/pcmasterrace, and /r/mechanicalkeyboards to name a few)
4Chan's /v/ (4Chan is a lot faster compared to other online discussion boards, so there's always something new going on, and there's always someone new to argue with.)
Dev. Blogs for games I play (APB: Reloaded, Planetside 2, Dolphin Emu, and even CryDev)
Youtube (If anyone says they don't use YouTube, then they're lying.)
I used to visit DidYouKnowGaming a lot, but their quality has started to fall in my opinion.