Also, you're using a pretty bright shade of grey for your shadows. I'd personally choose a darker shade on that and also on the edges on the armor of the guy with the Z on his helmet... Cause on darker surfaces it looks like he's glowing.
Just thought I'd show off the MAL theme I made. I did the artwork and my friend did the technical stuff.
http://myanimelist.net/animelist/Slib
(Slib is another screenname I go by)
What do you guys think?