I don't know what effect you used on stock for the first (or if the it was already like that), but it works really well with the rest.
The second is very impressive, but would be better if the mouth at the bottom was removed
Third is really great, Ilove the effects you did on the guitar
Fourth is my favorite. Clipping masks look awesome, as well as the vectors and flow. Awesome job on that.
Fifth doesn't really appeal to me as much as the others did. I suggest you spice that one up a bit.
Good job on them all.