My bench top is @ 41". It's actually quite high for me at 5'-7". Before this bench, I'd always built my own and at a lower height.
In 2004, my wife gifted me a garage full of cabinets including the workbench - all done by a local closet company. The base cabinets had to be mounted high enough to clear the foundation wall. At first, I was really concerned about the height and thought I'd have to fur out the hanging mounts so I could drop the cabinets down. But, I've adapted and now it doesn't bother me at all. It's actually handy to have the clear space underneath for storage. I have some busboy type plastic trays that slide under there nicely.