So, here's an interesting question: I recently got an email from a recruiter for Amazon saying I could interview for whatever org and whatever team I wanted. What are some sane, reasonable teams? Which teams are the most insane and unreasonable?
There is no easy way to answer this question. The best you can do is talk to people working on that group and ask the question. However, even with this knowledge there is no guarantee, because Amazon is always changing and doing reorgs, so what is a great group today can become a nightmare tomorrow.