What amazes me most is the commercial campground spaces that you pay good money for. They're rarely level enough for us ... whether they be dirt spaces that look from a distance "to be level", or gravel spaces that look from a distance "to be level", or blacktop/concrete spaces that look from a distance "to be level". Our levels on the drivers side door and dash always show the true situation.
The most amazing are the blacktop/concrete spaces that are not level ... what were they thinking (probably water runoff?) when they constructed them?
We're not "level fanatics" - we just must have the permanent bed with it's head end a bit higher than the foot end for sleeping so blood doesn't pool in our heads! Walking around the coach during the day on a one-half-bubble to one-bubble off coach floor doesn't bother us or the refrigerator much.
The ultimate would be for RV builders to install the permanent bed(s) on a platform that can be leveled slightly independent of the level of the coach floor ... but I guess that would raise the price of the RV a couple hundred bucks that they couldn't tack on extra like they can with multi-thousand dollar whole-coach leveling systems.