I was mostly just pleased that Dean seemed to believe Bobby when he said that. Dean's come along way from his hero-worship of John in the first couple seasons...for various reasons of course.

And yeah, I totally agree with you about the way Bobby was defining a good man. I think Bobby has a very strong sense of family (blood or not) and that never meshed well with John's particular priorities.

I was also surprised that Dean would let Sam die rather than turn into a monster - and I was proud of him for it. Dean does have lines that he won't cross, even when it comes to Sam, and I think that's what caused him to be the ideal candidate for the righteous man.

(not to say of course that John wasn't, just that I prefer to think he wasn't ;)