I hate winter. Spring is my favorite season weather-wise. I love rain, and I love 60-70 degree weather, and the smell of wet grass and rain. It's so evocative, man. Shorts are my garb of choice as well, so warm weather is obviously gonna jam with me better.
Also during the winter I turn into a vegetable and pretty much stay inside all day, and I don't really like that. Over the summer and spring and fall I'll go for walks and bike and meet with friends and what have you, and it's much more fun.