Ever since I started exercising and developed a better personal body image I go in the buff/close to it quite frequently. Though it's not super often as I absolutely love the feel of clothes. I also almost always sleep with clothes on too as it just feels better. I feel awkward for some reason if I sleep in the nude.
So, in summary: I'm comfortable being nude and its not infrequent that I am, but on the other hand one just cant deny the comfort of clothes.