The Cold Weather. My friends think I'm crazy, but 10 degrees weather is much more preferred than 90 degrees. Especially because it gets so humid in Philadelphia in the summer. Being in the heat really wears me out and makes it really difficult for me to breathe (I have asthma), whereas the cold is circumvented by layers of clothing and proper gear and my lungs generally feel better (if I wear a mask).
I really miss the snow already. I miss going down side streets and having to exercise great balance and patience or I will fall. I don't miss the snowballs and iceballs tossed at me by silly kids though.