My desires to dominate or submit are independent of how I'm dressed. They depend on how my girlfriend is feeling. If she's feeling dominant, I'll be her loyal servant/slave/knight/etc. Whatever makes her happiest. If she's feeling submissive, I'll take charge and be the dominant one. We play off each other, so we're usually complimentary opposites.

Side note, while I have no desire to be dominated by a man, I do get quite a charge when my girlfriend wears a business suit. Something about the lines of the suit on her frame.