So far I have created only 1 alternate costume, on one of my characters, combat outfit and 1 civilian outfit.
 
	Typically, my characters have their 'working' outfit, then multiple civilian outfits.
 
	I have friends I play with regularly and some of them will change outfits between missions, never repeating the same one. 🙂
 
	I had a character on Legacy that had her 'hero-ing' outfit and all the other slots filled with night-clubbing outfits.