OK....panty freak.. my sexiest pair of underware are completely crotchless. Not just in the crotch area. They are little pieces of spandex about a 1/2 inch in diameter that go around the waiste, then has 2 small loops that you pull up your thighs and they go around the top of your thighs. No fabric.
Just imagine a pair of G strings, but with out the fabric in the middle.. just the elastic.
De'ms fugn HOT! but ohhhhhhhhh my... they are >ahem< irritating? ( use your imagination

) So needless to say, they dont get worn very often.
My most comfortable are emmit smith cowboy boxers. ;-)