It sounds repetitious but from the posts above and in my experience we (m & f) both like a person who takes care of themselves, dresses smart, good personality, has intelligent conversation.
Personally, I would never take a girl out for dinner unless I wore dark suit, white shirt , bold tie, gold cufflinks, Jaccome by Jaccome* (guys this is a brilliant aftershave/perfume).I assume that a girl expects that. Generally, a girl will take a lot of trouble to look good for a date and if we are going to make an impression in the best seats in the house us men must do the same! Gentlemanly conduct of course.
* PS. I am down to my lost shot and haven't found where to get more. It was a present from this gorgeous Korean girl.......and that's another story...