It is always a matter of perspective. I know some people prefer to be on the sunny side. From what I can tell through conversations and can see in yearly ticket sales as sections close during the seat changing period, it appears to be quite similar in terms of overall number of people who prefer each side. As you look across and see people in sweatshirts when you are in Tshirts, it is sort of like those hot games when I am in a tshirt on the shady side and look across and see people sweating, wishing they could strip further. I have never been too warm at a Gopher game, and thanks to clothing options I have never been too cold either... and I have been to every game in TCF Bank Stadium. My bro-in-law prefers the sunny side for the same reasons you mention above.