I flew through there a lot. It's a typical Midwest Level 5 up/down. Slower winters, pretty decent summer traffic. Lots of VFR, practice approaches, and traffic going "up north."
Your tower sup is a great guy. Used to work in Flint.
There was someone who was asking about MKG the other day. MKG is in the same boat as MBS in that the MBS TRACON will be undergoing consolidation with AZO's new consolidated TRACON fairly soon. You'll probably be offered an opportunity to transfer, which could be a great thing for you. The agency has been slow to release information about it, though.