Clothes vs. Bare Skin
As a Switch, predominantly 'Ler but with plenty of 'Lee experience,
I've never understood the whole "super-sensitive" thing. "The movement of my clothes tickles me," and "walking barefoot through the grass tickles me" strikes me as being something that would be said purely as a come-on. If the movement of one's clothes tickled one, one would have a great deal of trouble staying composed in public; thus I must assume that any such sensation, if it exists at all, is so exceptionally mild as to be completely ignorable.
I'll bring up further ponderings on that subject in a separate thread.
As someone who prefers sensuality in tickling, I much prefer the tickling of bare skin in any event, but that's just me. I should probably add that I find bare skin to be more sensual than clothing, personally; I enjoy the softness, the warmth, the slight tingle of excitement I get with intimate skin-on-skin contact (I savor being wanted, and cared about, and what's a better indication of that than a 'Lee letting me get that close to her in such a situation?) I understand that some people do strongly prefer otherwise.
What I do REALLY enjoy, both in the doing of it and having it done to me, is sliding my hands up underneath clothing. I do believe that being unaware of the exact location of the impending tickling (ala, blindfolding; same principle) does increase the resulting sensation, and there's something about the sheer, mischievous quality of it that appeals to me.