You're gonna get flak for admitting to liking PewDiePie, but I get that it's your choice.
My favourite is Sips (part of the Yogscast)

Chuggaaconroy!

SeaNanners! He cheatsydoodles, but he does so with finesse.

Favourite Youtuber => Ownage Pranks.

Favourite Youtube channel => Screen Junkies.

I think Deceased Crab is my favorite Youtuber, and CinemaSins might be my favorite channel right now.

WarOwl!!!

Vsauce

Jerma985, you gotta love the laugh of that guy

Cry, sky williams, theoddone, phantomlord

KonyPlays, his DayZ videos are hilarious.

Errant Signal, he makes good game criticism videos and never resorts to using idiocy to get more views.

TheLittleFears also makes amazing horror shorts, but she disappears for years at a time.

A toss up between SeaNanners and Mr.Sark :D

i will get alot of hate .. but sometime pewdiepie is actually funny when he stops acting like a kid, some jokes are actually good

Cr1TiKaL

LinusTechTips is the only channel I'm subscribed to that could be described as being run by a "Youtube personality". All of the gaming ones are unrelentingly terrible, unless we're counting Giant Bomb's channel.

Yogscast (mainly Simon and Lewis) and TotalBiscuit

Ashens.

I have to go with Pewdiepie and MatPat with his 'Game Theory'.

AllShamNoWow.

Probably MrBTongue.

Ashens, Totalbiscuit, eh, gameplay stuff, I kinda like sips and gassymexican..jerma and star_ are also nice.

STAR_, Jerma985, Penguinz0 (Crit1kal), LazyPurple, and Projared.

TotalBiscuit

Totalbiscuit