I haven't rotated through Genesys yet but I hope to soon. If there is such thing as a "home hospital" I guess that is mine. I'm from the Flint area and know a lot of the hospital staff including a number of the docs. I can only tell you about the political atmosphere there as they have related it to me.
In case you don't know the history, Genesys is a three year old merger of Flint Osteopathic Hosptial and St. Joe's, an allopathic hospital. There has been a lot of tension between the docs and staffs over philosophical differences. Some of this has been sorted through over time but a lot of it remains. The director of clinical rotations at my medical school refuses to let us do core rotations at Genesys because he feels it has become overly allopathic in its training. There are some really good docs there (especially pediatrics)and if you can ignore the politics I think you'll enjoy it. I've talked with a couple of the interns and they really like the program. Maybe I'll see you there!