I wear old gray sweats and shitty looking t-shirts. So damned comfy.
Short pants and usually a tropical print shirt for me 365 days/year. I would die in sweat pants. Comfy yes but too damned hot even in winter for me around the house. Whenever the wife sees me come downstairs in sweat pants she says "Uh-oh.....your getting sick aren't you." That is the only time I feel cold is when I am sick. I just attribute that to me being such a hottie.