- John Watson, why are you in Slytherin?

- Arrogant, conceited, feels superior to everyone around them.
- You've just described every surgeon I've ever met.
(c) Criminal Minds, season 1, series 6

conversation with the Sorting Hat:
- Do you want an ultimate power, everlasting friendship, knowledge of the whole world?
- I'd rather heal people.
- Like having someone's life in your hands?
- Oh... well... something like that.

paraphrased from Anna Korosteleva