This is funny, but I always got the implication from the books that there had been people trying out for Seeker, but none of them had been very good. So McGonagall stepped in because she loves her House team.
Creation of the Marauders Map. >>>> It's because the map doesn't rely on vision. It shows people's physical place, which is still possible to find if you are under the cloak. Death could not find people under the cloak because Death was relying on vision.
Remus having serious discussions with Albus, Tonks embarrassing Teddy when Victoria is around, Mad-Eye being 'Uncle Moody' to the kids and despite his protest and annoyed look, he loves being around Lily Luna and teaches her useful hexes
Pardon the language…but I accept this. Alice and Frank would probably never forgive Snape for his treatment of Neville. Lily *might* forget it - never forgive, but maybe forget - and only after kicking his butt from one end of the afterlife to the next.