I prefer full cut brief, boxer briefs, and Trunks. (sometimes a jock)
I don't like thongs, bikini underwear, or Boxer shorts.
I used to wear mostly briefs. But, I find that I am liking trunks more and more. However, I don't like the low-rise kind. Their just doesn't seem to be enough room in them. I also used to wear white underwear only. But, now I enjoy wearing colors. I think it has to do with the broader selection these days.
But, I am getting kind of tired of all the dull colors. Everything is getting so dark and drab. Lots of Blacks and Greys. While women get almost every color in the rainbow, in 100 different shades.
I can only assume that most men's underwear is designed by old men and women. A younger guy would select better.