In the way I'm imagining it, I also have a costume fetish. However, at the moment it only practically applies to my girlfriend, as unless you make it yourself (and really, I can't do that) I have to settle for just her dressing up in a variety of sexy costumes.
We can live with that.
Nylon to some extent, but again, only on said girlfriend. I love the feel of it under my hands, and when she wore a nylon bodysuit that I got for her, I can safely say that ranks in the top ten purchases I've ever made.
In the same vein as nylons as possibly costumes comes heels and shoeplay. It doesn't have to be some really high heel to grab my attention; if anything, I shy away from the high ones. Shoeplay, dangling, dipping, etcetera, mainly things to distract my attention with two fetishes at once. Hard to ignore.
And as a very minor 'sometimes it's there, sometimes it isn't' fetish, desperation, or not being able to go to the bathroom. Not that I enjoy watersports, but it's more the feeling of power over her in a sort of softer, teasing way.
Didn't include bondage, because I don't really consider that a fetish.