I had a brief existential crisis because I normally say summer, but then I thought about it and voted spring. I don't know what's what any more. Amazing.
Fall, but winter is a close second. *looks at all the summer votes* Nope, nobody from the Southeastern US here, either that or you all just really like being roasted like meat on a skewer.
I love fall. The colors, temperature, and overall mood is almost perfect. November and December are my favorite months too.