I frankly liked this year's Sketch Collab, but then again I never did watch last year's, or the year before. Anyways, moving on...it was one I enjoyed watching.
The animation: All of them were good, some of them smooth and fluid; I don't want to pick favorites, but I guess I'll do so anyway :P My favorite was zeebrafication's and AirFaerie95's, and my vote would've gone to Kashi's part, but after the initial "intro", it just kind of deteriorated and made the rest of his/her animation look bad.
The graphics: It may bug me that it's sketchy-like, but some parts where they were colored in rather than having lines drawn across them were good. Then again, it's the Sketch Collab. In one word: Great. Well, by some. Others weren't that good.
The music: Well, it fitted nicely for all the animations, and was, all in all, a good choice of music; it helped create an atmosphere that fitted the animations almost perfectly.
The only reason I gave it a 9 and not a 10 was because some people's animation [parts] weren't up to the level of others, but then again it's a collab, and I've never participated in one, so what can I say about it? I don't know.
~~ Summary ~~
~~ Good points ~~
1) Some users' parts were great
2) Nice choice of music
3) Fluid animation
4) Good-looking art (at some points)
~~ Bad points ~~
1) Relatively bad-looking art (at some points; not bad, but simply not as good as others')
2) "Breaking" animation at some points for some users' parts