I don't know if its true, but i'm sure people would like it to read questions, answers and other main text that are in the Georgia font instead of the current Arial. What's the difference?
As you see, the text block on the top is Arial, the text block on the bottom is in Georgia. I think its a little change but for me it reads faster and give me a better user-experience. This font is also applied on Math.SE.
What do you think?