My office is business casual - leaning towards the casual. No jeans, but pretty much anything else is OK. My boss wears a suit about 80% of the time (and the rest of the time, he still wears a sportscoat). I noticed and started to upgrade my wardrobe, mostly skirts and blouses, not suits, and for winter I plan to go with dress slacks with a sweater set or blouse and jacket. Since I have been dressing like that, I noticed he has been treating me with more respect and offering me better assignments. Part of it may be that I think I act more professionally when I am "dressed up" but I also think, in his opinion, my more professional style puts me a step above my coworkers. Some of my coworkers have commented (unflatteringly) on my new style, but I just smile and keep going. I can wear what I wish to "dress for success"!