I am absolutely miserable in the summer, I can't stand the heat at all. I usually stay indoors most of the time with my air cranked all the way up. That is why I love the fall. The light is more diffused by the clouds, so you can see the colors of everything around you more richly, and the sun isn't glaring harshly into your eyes. I also love that I can actually open the windows in my place to let some cool, dry fresh air in. No humidity or bugs or fumes from people's cars and lawnmowers and crap like that.
I can actually start slow roasting stuff in the fall too, without worrying about it making my place uncomfortably hot. I prefer to slow roast in my oven, because I like the variety of texture it adds to the meats.