I suppose my favorite scene in all of TNG was where Picard is held captive (”There are four lights!) requiring another captain to take over the Enterprise. The new captain proceeds to tell Troi to get into some decent military clothing. The shock look on the counselor’s face was priceless.
Oddly enough the suggestion for that came from the actress who played Dianna Troi. She got tired of being the only one of the crew not wearing a uniform.