RL inspiration for character interpertations

I was just thinking and noticed that vision of Professor Flitwick has been altered in accordance with my association of him with one of my real life professors. I think if I went to Hogwarts and had the teachers described in the book I'd probably really like charms come to think of it.

So do you associate real people with characters? Okay that's a stupid questions because I think pretty much everyone does. A better question is this: Which characters to you associate with real life people and why?