Right on, I hear you guys.
Red, I wheel some nasty trails and ground clearance is rarely an issue, I drag my tracker over stuff that others clear... but it goes and goes..
I wheel with a guy in a nice little Sammy, TC Reduction, locked front and rear, 33" LTB's, great ground clearance, INCHES more than me.. but still.. He leads, I follow, I lead, he gets stuck, or can't make it. I crawl stuff he slides down or spins up.. HE REFUSES TO AIR DOWN. The only time he even gets close to getting me stuck does happen to be ground clearance, but I haven't gotten stuck yet, and he sure has. His little truck would be unstopable if he would just air down. He won't go lower than 15, and thinks that is LOW LOW... he isn't even squatting those tires.. he could run 0 all day long and go anywhere.. I am totally serious. I am going to let ALL the air out on him, way out in the boonies, and steal his compressor.. just to get him to try it. He tells me the problem is that he is TOO light to make it up the hills... he just doesn't get it.
I have to totally disagree about mud and tire pressure.. I have no problems with 5psi in deep deep mud.
as far as it being less of a concern with your 235's, vs my ltbs... no, I am going to have to disagree with you there too.. I had 235's on it right before I put the 31's on it, and the difference was night and day.
I am also going to have to disagree with the driving skill statement. You don't want your tires spinning if you can get away from it. Spinning tires tears up trails, and you simply don't have as much control over your vehicle if your tires are spinning. A good driving skill to master is never spinning a tire. Of course you have to, and a lot.. I know that.. but anytime you can walk a hill other have to spin thier way to the top of, you are exhibiting driving skill, conservancy, long tire life, less componant wear.. etc.. etc...
Take a look at this diagram, and you tell me, does airing down increase traction??