Smosh, DesandNate, and The Onion for funny videos. WhattheBuck for news on pop culture. Oabassi for finding new metal bands. A quite a few channels to get my Dubstep fix.
BLUEXEPHOS!!! He does a lot of videos(weird how he can easily download videos very fast)about gaming . Especially MINECRAFT so for fans of Minecraft out there try bluexephos or captain sparklez.
I probably posted in here already, but I found some more YouTubers that I like a few weeks ago: CollegeHumor (funny videos) ELPRESADOR (gaming commentary) F1sTDaCuFFs (gaming commentary) FPSRussia (gets guns and shoots stuff, entertaining) GhostRobo (gaming commentary) Matroix (gaming commentary) nqtv (Remi Gaillard, very funny guy) TheLonelyIsland (funny music videos) TheRadBrad (gaming commentary) TheSandyRavage (gaming commentary) ViolinTay (violin music) WhiteBoy7thst (gaming commentary) BeastFeed (talks about thing on the Internet, mostly game related things and electronics)
You'll notice most of those are gaming channels. I like watching videos on those because the gameplay and commentary is very entertaining and informative.
BlueXephos, CaptainSparkez and ipodmail for Minecraft stuff. I also watch a bit of TheFineBros just because of the 'Kids React to:', EpicMealTime, ChimneySwift11 and any other videos that may interest me.