Winter! Because it's so much more comfortable and feels better to heat up in winter then it is to cool down in summer.
Like, when you go to bed at night in winter... it's the best feeling in the world to go to bed under three layers of blankets with that warm, toasty feeling.
Plus snow... snow is wonderful.
What does summer have? Sweat and lots of sunburns? Ya... that's *sarcasm* awesome *sarcasm*