Why do some people get cold easily while other people get hot easily?
Fat - The amount of fat on my body makes a big difference. Over the past year or two I have lost 20 pounds. This was a significant weight loss for me. I weighed 158 at the beginning. Weighing 138 - I FREEZE. When I weighed 158, I stayed hot most of the time.
Physical Activity - Another factor is of course how much I'm moving. If I am sitting still watching a movie, I will need a blanket. If I'm vacuuming the house, I get a little warm.
Age - Your skin becomes thinner as you age. There is a decrease in circulation as the walls of the blood vessels lose their elasticity and the thinning of the fat layer under the skin that helps conserve body heat. And as people age, their metabolic responses to the cold may be slower. Vasoreceptors, for example, may not be as quick to direct blood vessels to constrict to keep the body temperature up. See this article: Why Do I Feel Colder as I Get Older?