Scottiemom X3
Amandasgramma point about fewer egos is an excellent one. I would separate teaching hospitals though into two categories. A hospital that is actually part of a university vs a hospital which has an affiliation with a university to teach its students. You may find the egos even larger than private practice at the latter style or at least that's my experience. The docs at the latter style hospital not only have the "God's gift to mankind" attitude but additionally an "I'm also a gift to the next generation doctor" syndrome.
Mayo may also be a good investigative choice.