User blog comment:Rupert Giles/Global Navigation January Update/@comment-25040297-20150130014431/@comment-5558012-20150130022925

"which most wikis have"
 * A statement that commonly comes out there seemingly with no data to back it up. As a result, I decided to randomly select wikis (the Random Wiki button at the base of all wikis). I took a sample of 80 wikis (ideally the sample would be best to be a little larger given the number of wikis on Wikia) and recorded whether or not they had a dark theme (looking at the text background as this is the largest background on a Wikia wiki). Based off the results, 76% of wikis (this of course isn't counting the thousands of wikis that are very small and have been abandoned and/or the defaults never changed which I didn't run into in this sample) have a largely "light" theme.

"There should be an option for all users whether to use the square frame or a circle frame for your profile picture."
 * User do have this customization option via their global.css pages. It's not a pretty button but it's there. Plenty of people on CC can can help with that.