In the 'making of' programme of the first film (on the DVD), you can see a scene shot with Spandex. A man who wears Wolverine's yellow costume (I can't tell who it is precisely) starts with saying Cyclops' line in the corridor of the mansion (when Jean uses Cerebro) and then...
"Jean ? , Jean !!....You saucy wench !"
That looks ridiculous...( the costume I mean) but it's hilarious
I think the leather costumes fit more for the movie (but less serious ones fit for the comics). The comics and the movie are two distinct universe, so I'm happy with this situation, actually.