I pump my road tires as high as I can get away with. I run minimum pressure on my MTB.
I weigh 250lbs and have older 27 x 1 1/4s and the rims are non-clincher (I think that's the right term) so I run just over the 75psi maximum "rim" pressure at 80psi. The 75lbs was printed on the original tires. So I think that is the recommended maximum pressure.
The guy at the LBS gave me a verbal beat-down when I told him I wanted the max 120lbs that was printed on the new tires!
On my MTB, I run the minimum ~35psi. Never had a pinch flat, which is cool, considering I'm a Clyde.

I just checked out the link...

OMG! I can't even use 20 - 23mm tires!









At All!