Summer is brutal, especially living in HOTlanta and now Miami. The humidity just seems to make it especially bad.
But the funny thing is that I'll still often sweat in winter and it is a different-feeling sweat when it is cold. I think my hands and feet swell up more then. And it often is really hard to be inconspicuous while sweating in cold weather.
Summer is definitely harder to deal with when it comes to footwear (probably moreso as I am a woman). I usually can't do sandals. That in turn sort of limits other aspects of my wardrobe. I feel the most comfortable in a clean, cotton sock. In the winter, I can wear these with boots even in dressy situations, with no problem!
Another funny (annoying) thing is that at work in the wintertime, I could never wear a sweater, because all of my coworkers would be sooo cold that they would really turn up the heater, which in turn would make me sweat off all my deodorant and be miserable. sigh. I guess by living in a warm climate, they were uncomfortable in cooler winter weather, whereas it provided me with brief moments of cool relief!