BGG and Greasemonkey
For a long time, the crazy colors and layout of BGG have really bugged me. There are too many shades of blue, and the modules appear to have randomized margins and padding. I spent some time poking around the DOM of BGG. It's really a huge mess in there! This is not meant to be a criticism. I understand how BGG has slowly evolved--tweak after tweak. It's really hard to grow something and keep it live and organized at the same time.
These are the things I tweaked in this first round:
Too many shades of blue. I made the main menu and the recently viewed header the same blue as the normal modules. I also made the lower portion of the main menu light gray. Now there are only 3 background colors on the page with the exception of the BGG logo.Here's a before and after image of the changes:
Every "box" on the front page now has an 8-pixel margin on all sides, even the edges of the browser window.
I removed the footer, since I never use it.
Here's the script I used to do this. You need Firefox and Greasemonkey to use it.