My thoughts on some of the local trails...
Bass River - very twisty single-track through the woods with some log piles. Slow due to the turns and not really any hills, but it's nearby - a good fall-back trail if nobody's up for heading for the trails further away.
Pigeon Creek - multi-purpose trails (no horses, though), not that great... but I take the kids there a couple of times per week and they love riding it. Wide trails, some noticeable downhills, sand isn't too bad.
Yankee Springs - great single-track trail - some pretty intense downhills with small repeated dropoffs. A bit too sandy. I consider it the most challenging trail that I've ridden around here.
Cannonsburg Ski Area - really two things, a skills area and a single-track course. I'm not a big skills guy. The trail is fun, with a good mix of hills and turns.
Cannonsburg SGA - I know it's the first one people mention usually, but it's not my favorite. It's definitely a good single-track trail, I just don't see it as the top attraction here. Good hills, not very twisty. Lots of riders usually.
Luton - I love this single-track trail. Very good flow, with twists, hills, and an obstacle or two. It's 9 miles of heaven.
Shearer Road - Pretty similar to Bass River. I only rode this once and plan to go back. Trails connect it to Edwards Creek.
Edwards Creek - Unique single-track. A variety of obstacles, some decent hills, a little of everything. I also only rode this once, but am looking forward to returning. Everyone in our group ended up bailing off of some seesaw or wooden planking at least twice.
Robinette's Orchard - Mostly single-track. This one costs some small amount of money. I didn't love it - there are some grassy spots, some overly steep short hills, too much sand, and a couple of dangerous drops. I'm guessing some people love this course, but it doesn't fit my style.
Owasippe - I'm not clear on whether/when this will be open, but I rode it once last year during a group ride and it was excellent. Single-track with hills, great scenery... a bit like Yankee Springs without as much sand. I'm psyched about getting back there this summer assuming it's open. There are also supposed to be just a ton of trails there in addition to the course we rode last fall.
If I had to rank them for my own enjoyment, it'd be:
I still need to try out Ionia, Big M, Fort Custer (sounds great), and the new trails - I don't know the status on those because I can never make the WMMBA meetings.