Not bad

Nicely animated, Very smooth, though I recommend steering away from Blinns if your making something thats organic like a skull.
Work on your textures.
Otherwise not bad, though I doubt this is actually yours.

Meh...

Too short, no music, and yes, 3D does rule :D. I'd suggest that you make it longer, improve the video quality of it, add some tunes and give the weird alien guy some expressions.

not that great

It had no sound, and the quality of the video was pretty bad. Also it was too short. The animation itself was ok though.