I am EXTREMELY sensitive to heat. I find myself literally panting like a dog if I have to be out in it. It makes me feel like I cannot breathe.
When I lived with my parents I would close all the heat vents in the house cuz I couldn't stand it. Used to drive my dad nuts.
I'm not big on cold either, but I can take it much better. I do find myself constantly turning my aircon up and down though, like I can really feel the difference between just 1 or 2 degrees.