If they don't have "much of anthing to do with" it, then what does? We have had two players in the relatively recent past who likely (or in one case definitely) would have gone number 1 in the draft and chose to return for their last year of eligibility in Jake Long and Taylor Lewan. If you don't think loving the school and having a good head on their shoulders plays a role, then what do you think does? My point is some people make the choice to stay, so why is that in your opinion.
here's one vote for "John Beilein's head in a Futurama jar"