I said "none," but it's actually a toss-up. For me, the question is more like, which season do I dislike the least?
Let's see.... Spring, everything's in bloom. Darn allergies. Summer, not always too hot, but definitely too humid. That's what I get for living near a lake. (First year in Michigan, it was either raining or humid most of the summer; I got to like the rain real quick.) Fall, harvest season, and the allergies again. Winter, the house is entirely closed off to keep it warm, meaning the dust tends to settle. And did I mention the allergies?
I need to move to another state. Arizona, maybe.
If it weren't for the allergies, I would have said "all"...except the hotter parts of summer, of course. Every season has its own beauty, and I really need to start carrying my camera around to catch those moments.