I think the fact that the banners you offer are quite a bit large than the thumbs may have something to do with it. Not being a worm/troll, but it has a banner farm feel. Not because of the amount of banners, rather because of how overwhelming they can be.

I'd:
- enlarge and clean up the thumbs!
- Have only one animated banner (two are distracting) - replace banner.gif with a static one.
- Change the background colour, as it is too "greyish" (not exciting).

Basically, I make sure one's eyes cantered in on the thumbs, not the banners.

MHO.