Ok, Dumbledore was a great mentor to Harry, but he was an exception as far as we can tell with headmaster mostly remaining an administrator. So, aspiring grad students might think that they are just like Harry. Doomed? Oops. Plus didn't Dumbledore set Harry up to die, kind of?
Perhaps students considered Minerva McGonagall to be their likely adviser. They must like tough, stern, but fair. Ok, I guess I can see that.
Potions Prof: Either nasty Snape or status-conscious Slughorn.
But it is the post of Defense Against Dark Arts that should give any aspiring student pause if Hogwarts is what they imagine grad school to be. Of the six (we shall discount the last year since we do not realy see much of Hogwarts in the seventh book), we get:
- sincere and competent but split personality,
- quite good but with a hidden agenda,
- bureaucratic tyrant,
- quite nasty but with a hidden agenda.
Update: So, of course, this raises the question of which model is your adviser most like?