in terms of exercise, none. I'm professional couch potato, no matter how you look at it
in terms of anything else: winter. I don't have the crippling depression of summer, the anxiety that comes with spring, or the... whatever I feel in autumn (to be honest most of the time I don't know, autumn's weird for my mood). but no: winter is my favorite season and the one I feel least depressed in
question: what issue you deal with bothers you most? (bp or otherwise)