I pretty much only follow video game channels. I used to follow certain record labels' channels like Roadrunner and Nuclear Blast, but then they started flooding my feed with stupid advertising crap and I chopped them from the list.
What I follow now:
-331Erock - Not gaming related (well some of it is), but this guy is SERIOUSLY talented and does these absolutely incredible metal covers of pop-culture songs like movie theme songs, T.V. theme songs, video game themes, and popular pop songs. And you can really tell he enjoys doing them, too. I look foward to each and every video he does.
-8-Bit Rob - Very entertaining reviews starring everyone's favorite smart-ass robot, 8-bit R.O.B. I haven't seen a new video from this channel in a very long time, though. I think whoever did these are done with them, now.
-The Angry Video Game Nerd (JamesNintendoNerd) - He gets a little too juvenile at times, but he's still enjoyable to watch. I'm looking foward to the movie, which seems to have been in production forever now.
-Classic Game Room (InecomCompany) - Great classic game reviews from one of the oldest video reviewers on the net and the channel is updated pretty frequently.
-CGR Undertow - A spin-off channel from Classic Game Room, but using different reviewers than Mark from Classic Game Room. Updated daily with new videos.
-G4Icons - The best video game show to ever air on T.V., IMO. A very entertaining and informative documentary-style series on the history of gaming, and on various popular game series or game developers. These are now being released on YouTube in spurts.
-The Irate Gamer - I really like this guy's reviews. Very amusing, and I love the recurring characters he creates. But he REALLY needs to add at least one or 2 new people to his cast and crew, and it would be great if we got more than 3 new ACTUAL episodes a year.
-Turbo Views (spida1a) - TurboGrafx-16, Turbo-CD, and PC-Engine reviews ONLY. This guy REALLY knows his stuff when it comes to these consoles, too. Very informative, and very-well produced reviews.