The perfect temperature for me is around 65F. The kind of temperature where you can walk around quite comfortably in a light sweater or a light jacket over a t-shirt. I hate hot humid summers, I don't know how anyone can find them pleasant. At least when it's cold you can put more layers on....when it's 100F and humid, you could be naked and you'd still be dripping with sweat. 

I kind of like battling against the cold. You burn a ton of calories and it stoutens the constitution. Makes me feel alive. In contrast, waiting on a NYC subway platform in 110F humidity makes me feel dead.