There's a lot of grey going on with the site right now. @Clebeuf suggested that we do something pinterest-esque and load colored tiles to at least make things pop a bit. Personally, I think this would be an awesome idea and something we should play around with.
We've also tossed around the idea of putting category-specific icons to help break up the visuals a bit. There are some pretty cool icons here: http://goodstuffnononsense.com/free-stuff that we could use?