@ Socme - - I would consider Yale over Michigan simply because I completed my undergraduate at Michigan and have been working for the university in various teaching & research capacities since I graduated. I absolutely love Michigan, but it might be time for me to spread my wings.
@ Goingcrazy - - First of all, congratulations on your acceptances so far, and best of luck with Princeton! I hope something opens up for you there. I am very aware of how fortunate I am with my admits, and I'm not taking it for granted! I now have a tough decision to make, like everyone else. One of the faculty I work with at Michigan recently told me that I am "suffering at a high level." Again, best of luck with Princeton! Fingers crossed for you!