I think its very well done. As to the thickness, take a look at the fight Goku has with Little Buu on the Kai planet. His hair is very thick.
Wont anyone ever listen, every one of us taht models SSJ3 says that the hair stick out from the body for animation purposes. his idle wouldnt be like that with it kida lifted that way, itd be against his back like it really is.
very good I like it ;D :yes:
(wish one of my 4 goku hairs was that good hehe. I was doin a good one till my parents jacked my comps power cable:S )