I don't remember how I came across this guy but, his name is penguinz0.
His game commentaries are hilarious .. to the point that I was literally in tears once in class. If you're into funny commentaries, I recommend this character.
Oh, man. This list is way too long for my own health.
The main ones I like, though, are Chuggaaconroy, Bikdiponabus, Yogscast (Sips, Sjin, Duncan, Nilesy, Lewis), Cr1TiKaL and both of the Game Grumps.