Pewdiepie? Totalbiscuit? Yogscast? Game Grumps? Who do you like to watch? 

manlybadasshero
dashiegames funny as ->-bleeped-<-
chisaleya
hcbailly

I used to watch theradbrad, but now I tend to watch hassanalhajry, just because his LP's come out soo fast.  I remember watching the entire one before the game actually even came out, lol.

I haven't really watched anything from him lately either.  I have been watching World of Longplays. 

MARKIPLIER!! He is the first gaming youtuber I ever subscribed to and he is pure 100% awesomeness! He's just so freaking funny and he does charity livestreams every now and then for different charities. He just recently did a charity livestream to a support group (forgot the name) for depression and bipolar people.

I think it depends for myself.

Markiplier is my go to guy for boredom watching. I watched him play an Amnesia remake called, "A Late Night Drink." And it had me laughing for hours. So when I get bored I'll go to his channel occasionally and watch something for entertainment.

But if I'm trying to get an achievement on a game, or a legitimate walk through, I will search for hours through different people. A lot of chit chat while looking for information can irritate me. So if I'm getting too much personal talk or rambling, I will find someone else.

Yay for Markiplier!!! I love watching him play FNAF - his channel was an instant sub from the start.

Waaay too many to list, but...

NintendoCapriSun - Possibly my first YouTube subscription. If not, then definitely the second. I've been following him since he was around 20,000 subs. That was quite a long time ago. My all time favorite LP channel.

TheSw1tcher - Best LP channel for entertaining commentary, IMO.

Game Theory - For interesting videos analyzing video games.

HCBailly - I don't watch him much these days, but this is the guy to go to if you want to see some true mastery of JRPGs. I'll never forget that one boss fight in Chrono Trigger...

SuperJeenius - I love his commentary style and his blind LPs.

Too bad I won't be here to see any responses past mine(going to be in the desert without much internet for about 5 days)...

But....

1. TheRPGMinx
2. BereghostGames
3. Markiplier
4. Node
5. Ohmwrecker
6. Bryce Games(don't know his channel's name)
7. BaronVonGamez(only for his group content, haven't watched in a few days)

Mostly watch RPGMinx, Markiplier, and Bereghost though. Love Bere's family content, especially the APB series(could never get into the game myself.. mostly due to weird crashing issues, and I hated the community).

Too many to think of :s

Total Biscuit
Tamashii Hiroka
Dodger (Presshearttocontinue)
Game Theory
Nerdcubed (although he may be getting unsubbed for being annoying)
Boogie2988
Shoddycast

Game Grumps (Arin is so cute! :3) and the Angry Video Game Nerd.

I'm intrigued by Markiplier but haven't gone to his channel yet.

1. Nerdcubed
2. Game Theory
3. Batclone
4. Game Grumps
5. DanAndPhilGames
6. Yogscast

I used to be able to list like 30 things, however nowadays I busy myself more so with playing the games with my friends then watching someone else play them.

Mythosofgaming
Lennyficate
Gronkh (started watching in 2010 or 2011)
derkegy
Angry Video Game Nerd (started watching in 2007 or 2008)
The Spoony One/Noah Antwiler (although his videos started getting less interesting after his nervous breakdown and diagnosis with bipolar depression. He's doing more DnD Vlogs now and videos with his girlfriend. His Ultima reviews were pretty good, although i'm wondering how much he was actually acting in his Ultima 9 review, he seemed pretty unhinged and looked unhinged too, and he's not too bad at acting too. And his Dr.Insano, who solves everything WITH SCIENCE! is pretty funny too.)

I'm going to throw in Lucahjin, because I've gotten hooked on her stuff again.

Also, yes! AVGN! How could I forget him?