Frankly, for someone that's never been to Cedar Point, EVERYTHING is worth hitting. IF you go the whole weekend, I might wait about riding MF until Saturday. That way you can ride some of the smaller rides (I cant believe I'm calling Raptor, Mantis, Magnum, and Mean Streak smaller).
Ride everything you can on Friday, and then bright and early on Saturday, ride MF. But if you can't resist the unbreakable urge of riding MF first, I wouldn't blame you.