I love to see a fit guy wearing a pair of briefs, or even boxerbriefs. I instantly look for the dick outline, and then notice what direction it's pointing. I love to see the dick pointing up toward the waistband. Although I love how briefs and boxerbriefs look, I don't wear them very often. The snug fit is uncomfortable to me.
If the guy's wearing boxers (which I wear all the time), I'd rather see them on my bedroom floor than on him. Boxers don't look sexy to me, but they feel sexy when you wear them the way freeballing does.