I went back and forth on answering this question, and what seemed like an easy reply to start, turned into a big contemplation. Ultimately the answer is "Yes".
Starting with the basics.... I think it's probably safe to say the vast majority here underdress, and there's just really no substitute for the panty (even the boyshorts). As has already been pointed out, you can make men's underwear with the same materials, and the same colors as women's panties, but the way the material is cut to fit the feminine form, well...that just make the garment what it is. VS Pink currently has a panty that looks like a men's "Y-front", but it's still cut to fit the feminine form, and therefore makes it more attractive than if a male version of it were offered. This same aspect translates to female specific clothing, like dresses, skirts, blouses and leggings and shoes, and on, and on. If someone were to make a dress using chiffon and lace, but cutting and sewing the material to fit the male physique, it just wouldn't be the same.
I know there are widely varying degrees of crossdressing and transgender personification, and I think each of us have developed a feminine entity within ourselves, to which we then mold into a tangible form with a personality. It's the depth and granularity of that personality that is then translated outward through clothing, wigs, makeup, mannerisms, voice and body alterations, and finally, the ultimate translation of SRS.
