Fall is my favorite for all the reasons Birds listed above. Plus you can convince yourself a good winter is on the way regardless of all the long range outlooks.
I'll rank winter #2, but mainly because of snow. I really don't care for cold, I just tolerate it because it's an ingredient for snow.
Kind of a toss up for #3, but I'll say summer even though it features my least favorite weather. But in the back of my mind, I know fall is the next season.
I used to love spring as a kid. Probably because more daylight meant I could stay out later to play and the last day of school was on the horizon. But it seems our springs today are cold and wet (mud season). And it means I have to get my lazy butt back outside to do yard work. Oh yeah, and 4 months of hazy, hot and humid weather are on the way.