I either dislike or hate all the ones with humans - especially the ones with babies or young children. The other ones mostly just piss me off, as they show as evidence for the stupidity of humanity, in so many ways... especially the part where you're supposed to find it funny when people hurt themselves. It utterly disgusts me and even makes me cringe. I have never liked ones with humans, even when I was little.
I like many of those with animals, though... as long as no annoying child appears, anywhere, in the video. I don't like any with monkeys, though - they remind me of humanity. Ones with dogs, cats or ferrets are usually the funniest... not that they make me laugh, very often, but they can make me smile, at least. I hate that they have to do voiceovers, though, and have people laughing in the background. -_-;