I never rode a trail I didn't like.
But some of my favorites are:
Drummond Island, there's some cool trails on this island, some real technical stuff and some just buzzing down the two track stuff, I like the tech stuff best.
Going out to Glen cove is cool, but I thing my favorit ride is the one that goes to Marble head, WOW, there is this big rock wall that looks like 3 foot stairs on one end, it's intimidating at first but it's a cool climb once you figure it out.
One time when I was up there I saw a guy putting around in the water with a KDX 200 or 220 I don't remember, but anyway he was in about a foot of water and next thing you know his bike almost disappeared, nothing but the handle bars were sticking out. He got out and we helped him getting going.
Sandtown, east of Newberry is a nice ride.
Silvercreed west of Newberry is a nice trail, but last time I rode it a lot of the markers were down, and if you didn't know where you were going it would have been easy to get lost.
There's another trail I rode last year in the U.P. I think it was called the Two Hearted River Trail, I really enjoyed that one it's not to tough but it's scenic and you can take it right to Lake Superior. There are places on the trail to get gas, food, and drink if you want.
I would have to put Evart as one of my favorites, it's not just the trail some of it is the memories, I've had some good rides with some good friends on the trail. I have way to many miles logged in on that one, well on second thought maybe not.
You know the problem is the longer I sit here and think about it the more favorite trails I can think of. I don't know if it is addiction or love, either way I'm hooked.