I was always afraid of burning my eyes out with the default white layout of this site. The grey was such a welcome surprise! It looks great AND saves my vision. (No, I do not have any clue as to why I never checked for other layouts before now).
So if you are still using the white, I highly recommend trying the gray (there's also a steel blue one).
Click your name in the top-right corner--the various available site formats will be at the bottom of that page.
(This post was brought to you in the name of avoiding the paper I should be writing).
Have a good Tuesday everyone. :D