I get my seat going in any direction I can. I get bored sitting a certian way. sometimes all the way up, sometimes down, half way up too.

I'm an "adjuster". Cruising - All the way back, locked, just enough air to keep me from bottoming out, and reclined back a little. When I take the off ramp for a truck stop or town I move the seat up a couple notches, and let all the air out of the seat. For me it makes it a little easier for shifting and running around town.

I'm 5'10", but my legs are pretty short compared to my torso. So I keep the seat all the way to the floor off the highway so I can push the clutch all the way when leaving a stoplight. I raise the seat up once I get on the highway.

Seats set too high will restrict the blood flow to your lower extremities causing pain and that rubbery leg feeling when you try and walk after hours of driving.
You should have your feet flat on the floor with a 90 degree angle at your knees.
Having said that I keep my seat on the floor for the most part and the lockout disengaged. I want to feel the truck sway on a turn and in the winter I want to be able to feel a slip or slide in the seat.

I like to keep my seat low and the glider unlocked. Can't stand being bounced around all day. If it was my own truck I'd be throwing a lowrider in. Lowriders are pretty comfortable.

as low as it will go, and floppin around. You guys that think a 379 rides rough, are these low leafs? My low leaf 379 is the best ridin truck I've ever driven.

Factory "chugger-snubbers" are not adequate for me. I unlock the fore/aft adjuster allowing the seat to float forward and backward about six inches. This modification was easy with my present seat. I tilted the cushion and found a slot in the adjuster just the right size to be disabled with a cross-section of tarp strap. In my previous ride, I also disconnected the seat's shock absorber. I tilt the back rest back and add a lumbar support. Do not lean forward with the weight of your head and shoulders supported by your belly. Lay back and let the seat support your weight. In summary, my seat is "disconnected" from the cab. To those who want a stiff ride to maintain control at all times, etc., I say "You are just along for the ride anyway. That truck is going to do whatever the road dictates. Why should you suffer and wreck your spine during a 40-year career? You are responsible for your own health." Some of these seats are designed to look good in a truck show, but that is all.
I also check the adjustment rod of the cab air bags. You should be able to pull the cab down a couple of inches while standing next to it.

I tend to move my seat around as my comfort level changes on long drives. I always float mine.

On another note, I tend to move it as high as it can safely go when I'm in urban areas and there's lots of "scenery" around!

i put mine halfway, just like i like it, so i have the best vieuw and comfort in my MAN

I'm 5'8" tall and find the passenger seat too tall!! I have it flat on the bottom yet I still cannot put my feet flat on the floor!! I've never seen this before!! Mike's seat can go down far enough but not my seat. Therefore, I ride with a pillow on the floor (covered in plastic so it's not wrecked) so I can put my feet flat on the pillow and be comfortable. I shift around a lot, too, 'cause I get sore riding in one position for too many hours.