I dunno man. I thought the same as you, but I played around with the paperdoll, and some clothes work surprisingly well. For example, I think the pink blazer works with just about anything. I was surprised with how well it went with almost any outfit.
I do agree that there's a lot of black clothing that looks great in this game, but I usually prefer contrast: a black lower with a colored upper. The pink crop tops in particular looked well with the short black skirts.
But maybe you're right. My favorite color is green, and one would think that yellow or red wold look great with our sissy character, but it doesn't seem to.
What makes it worse is that some of the clothing that looks nice and respectable, are actually latex, so practically fetish wear. Why would I want a latex Asian costume? Make it silk or some shit. I want my character to be tastefully sexy, not a whore 24/7.