I have had a Clyde/QH X for 17 years. I totally agree with the heavy on the forehand, and he is also nearly impossible to bend. I say he is like riding a refridgerator.
He has an awesome slow trot, easy to sit to, but his canter is a bit like a rocking horse at times, until he gets rolling, at least! Bombproof on the trails, only looks at things if we "move the furniture" (a jump, or a new limb is down). He takes good care of us for sure. Used to do small shows-h/j and 4-h with my daughter, and did ok, if the judges liked drafts.
He is the EASIEST keeper I have ever had, no shoes ever, and only gets a handful of pellets twice a day, just bc we feel sorry for him when everyone else is eating. He really should have a grazing muzzle on, but since he is semi-retired, I don't. He gets hay only in winter when there is no really good grass, and has the BEST personality ever. My big lap dog! We love his feathers, and have let them grow the last couple of years. You can look at my horses-he is the chesnut.