Apart from "the obvious" ;-), Minerva's interactions with Albus are priceless:
"Another? At this point, we have covered Dolores Umbridge and the Ministry, Hagrid, whether Filius will be next in their sights, Harry's activities in the Room of Requirement, and — not insignificantly to me, at least — the actual education of our students. What have we missed?" - "Severus" Wonderful!! Minervas_Eule