Well, isn't this a good question. Here are some of mine:
Storm Dain Productions - A brutally honest, and hilarious game review show that no one knows about. T__T Check him out, he's hilarious
http://www.youtube.c...DainProductions
FarFromSubtle - Probably my favorite gameplay channel that doesn't focus on the game at all, and rather the people. These guys are hilarious, check them out.
http://www.youtube.c...r/farfromsubtle
Game Grumps - You're already subscribed to them, so just continue onto the next one.
http://www.youtube.com/user/GameGrumps
Ninjabridge - Does Naruto: The Abridged Comedy Fandub Spoof Series Show. If that name doesn't entice you, I don't know what will, check it out!
http://www.youtube.c...ser/Ninjabridge
PurpleEyesWTF - Probably my 2nd favorite anime abridged style channel, and is responsible for None Piece, and Code Ment.
http://www.youtube.c...r/purpleeyeswtf
HAWPOffical - It's video games, it's sketch comedy. I don't even know about this one, but it's wonderful.
http://www.youtube.c...er/HAWPOfficial
Teppeikunviolin - It's a Japanese dude playing violin over video game footage that's played in real time. I love it, and it's awesome, so check it out.
http://www.youtube.c...teppeikunviolin
JonTron/PBG - They're both so similar, and chances are you already know who they are, so I'm just listing them here because I love them, and they're awesome.
http://www.youtube.c...anutButterGamer
http://www.youtube.c...ser/JonTronShow
BrutalMoose - It's like JonTron and PBG, but for hipsters because it's much smaller. Check him out, he's hilarious.
http://www.youtube.c...ser/brutalmoose
I think that's a pretty good representation of the kinds of things that I like to watch on You Tube. While there's more, it's all I'm going to do for now, but I might update it later!