Nice, but nothing too special...
As much as I like frame by frame animations, this one wasn't among the greatest ones that I've seen. It's still a nice piece, though; I liked some of the transformations here, the best one was the snowman (which you don't hate so much, apparently :P). And I also enjoyed the randomness, where you switched the "themes" constantly.
There's room for improvement, of course. I think that you "forgot" about the background, you could have put something in there, at least when there wasn't many things on screen (like in the basketball scene). I also thought that it ended soon, you could have explored your skills more in here.
Overall, a decent FBF flash, way above the average, but still not over the top. Keep it going, always getting better!