I don't know anything about the downstate parks, but up north, these are my thoughts
Boyne Mt- park is getting better now, new crew, new ideas,.. superpipe, lots iof rails, a beginner park and a boardercross.
boyne Highlands- 13' pipe, wallrrides, lots of rails/boxes, well maintained, 4 parks with a long boardercross
Crystal- never been there
Schuss/Shanty- 13' pipe, 3 parks at Schuss, 1 large, 1 small/med, and a area that changes though out the year, well maintained, good setups, a 3 sometimes 4 tabletop jump line, a variety or rails, dedicated park crew, on duty everyday . Summit will have one top to bottom run, with several rails and jumps this year. cheap- $5 wed nights, 4 for $40 Mondays, $10 at the Summit (Shanty) everyday its open(fri, sat, sun only)
Otsego- better know some one $$$$- heard its badass. late in the season they offer public night skiing one or two night a week on 50% of their terrain
Nubs- perfect superpipe, plenty rails and boxes, lacking in a jump line. Plus a small boardercross. Nice park sometimes the approches are hard to use.
I think all the areas are stepping up their parks again this year, and all offer different ideas and the way the parks feel.