*laughs at the latter* Yeah, fortunately for Ed (and probably Rin too), his favored look isn't so outdated (or bizarre) it isn't likely to come back in style. But, Mephisto is probably out of luck.

And, yeah, I can also see Ed going either way about his clothes. He does have a unique style, but it's also canon that he gets completely absorbed in his work. (You just know he probably skimps on the laundry sometimes and cleans his clothes with alchemy. And then, Al washes his things while he sleeps to make sure it's done right.)