I have a tendency to walk so quietly, that I can sneak up on people who supposedly have great hearing. Having lived with me for so long, they start to glance around themselves at random intervals to make sure I'm not around. I usually scare the shit out of people, and they yell at me for it.
The opposite is true for hardwood floors. Having chronic flat feet from a dual case of congenital talipes equinovarus, I can't walk silently on hardwood/vinyl floors. When I walk on said floors, any form of pressure forces all air out from beneath my feet. This is normal, but with the way my feet are shaped, it makes a seal to the floor that, when broken, makes a suction cup release sound. If the floor is a kind of glued down vinyl, like we have, I can force my feet to make a seal, and pull the vinyl off it's foundation. It sounds like a wet flipper when my feet hit the floor, and a suction cup when it comes off. Wat.