This thread got me thinking - back in 1993 there was an issue of X-Force that took place just after X-Cutioner's song. Cannonball and Prof X are having a squabble about the morality of their actions and the best way forward. The other half of the comic is given over to Boom Boom using (yes really) a Shi'ar Costume Generation Machine to give everyone in X-Force a makeover.
Cannonball's is mainly zips. Hers is pouches everywhere. Feral's defies logic and gravity. The others are just what the 90s did.
I didn't think those were bad costumes for the time. They were certainly improvements over what they had been wearing (except maybe Shatterstar.) Rictor's pants always got to me though. I never understood what they were trying to do with those.