My favorite moment with Professor's had to have been Professor McGonagall teaching the Gryffindors to learn how to dance and using Ron as her example partner. The uncomfortableness Ron felt, how much everyone else was clearly enjoying his discomfort (I like to imagine McGonagall was enjoying it as well because sass master) the whole thing was just beautiful. One of the scenes I remember most getting a belly laugh while watching the series!

Movie wise!! I love when McGonagall said Voldemort names for the first time in the final movie to Flickwick!!!

"He's going to try to kill you either way" --- What an excellent moment!!

Book wise: Any time McGonagall had to deal with Umbridge and her remarks to her!

Definitely agree with the moments mentioned so far! The dancing lessons in the movies is such a funny and memorable scene And I love the interactions between Umbridge and the other professors, but especially McGonagall, in both the book and movie. In particular, the scene in the book when Umbridge is being chased from the school, and McGonagall indicates she would help if Peeves hadn't taken her walking stick

I also enjoy just about any scene with Gilderoy Lockhart. His arrogance and obvious incompetence and the other characters' reactions to him are just so fun to read about/watch.

One interesting moment I remember from the movies is Umbridge inspecting Snape's lesson. A perfect dialogue that clearly shows both characters' personalities - the acting was amazing too - ending with Ron being whacked on the head, as always. xD

Literally the entire performance from Kenneth Branaugh as Gilderoy Lockhart. He had every aspect of that character down pat! Especially when he got hit with the memory spell at the end that was meant for Ron In the books you obviously understood that he was a liar who got to be famous by stealing the stories of other people, but Kenneth added the charm necessary to show how he got AWAY with all of that up until this point.