I am one of the few ppl I know with a mood disorder that prefers the colder/drearier weather. I am naturally warm natured, plus I have a condition in which if my body temperature rises so high against the surrounding environment I get overheated/hives, etc.... luckily that doesn't happen often. I haven't worn longsleeves in years (aside from coats) because inside buildings the heat is way high and I can't take it. Summer is awful because I live in such a humid area...I can't stand to not have A/C. Also, I've never been a fan of direct sunlight; my eyes are very sensitive to it, and while I tan naturally, the sun's rays are too much unless I'm in a creek or somewhere with shade.
I've never felt I lacked in Vit D. I may have been, but I haven't noticed, lol. I can't say I'd want to live in a non-stop cloudy area, but I prefer it and rain over 90+temps w/sauna air anyday.