My shoes are in my bedroom so if I'm going out I'll put on those shoes when I get dressed (and inevitably walk around the house a bit in them as a result). Usually I take my shoes off a few minutes after getting home as well (although sometimes I get distracted and forget ).
If I'm at a friend's house, I tend to follow what they do.
pretty much all my friends do when we go to others peoples houses, but I often slip my shoes offbecause I like to be comftable. At parties and stuff I keep my shoes on though, not when I sleep/pass out though. I can't see why anyone would wear shoes in their own house, although I would wear heels or something if I was throwing a party, dinner party or entertaining a guy.
My gf is the clean and neat freak of the house, shoes off at the front door and kept on shoe racks. Actually even before she moved in I used to take shoes off as the house has real wood floors and originally was going to sell this house, so didn't want to scratch the varnish and lacquer coats.
But since she moved in, she sweeps and mops the floor everyday, heh I think she might throw a major fit if I wore shoes in the house.