TGS is the best. I don't think I dislike a single channel on there.
The main ones I watch are totalbiscuit, OMFGcata, yogscast, huskystarcraft and the normal boots guys.
What I like about TGS more than machinima is that they actually seem to put more work into their videos. Everyone there apart from maybe husky has great production value. The work they put in is insane, and even though IDK how much husky edits in comparison to the others, he still works hard on it.
Now that WoWcrendor swapped to TGS, I don't like anyone from machinima :/
I hate how toby releases like 3 very short videos a day with not much work in them. It's an obvious attempt to get as much money as possible. It's a bit insulting.
I just don't find uberhaxornova funny, at all. Bah.
The one machinima channel I have respect for is PewDiePie. I don't watch his stuff, but he has longer, high quality videos and doesn't so much jump on bandwagons, as he creates them.
Compare that to the work that say, peanut butter gamer or jontron put in their vids?
No question. Plus most machinima channels are generic lets plays or CoD commentary's. I barely ever like lets plays, OMFGCata is the exception, and I prefer the non lets play stuff that the yogscast do.
If I had to recommend a smaller channel, I'd say the AuZZieGamer. That guy is funny as all shit, and like most of the other channels I like, the work he does is great. He's absolutely hilarious, and just came back from a long hiatus.