My house, my rules. Besides, the vast majority of the time elapsed since we evolved into being bipeds have been spent with said feet going bare. I, for one, am finding it much more comfortable to walk around without shoes on than the opposite. Furthermore, as a token of my good will towards any and all guests, they are offered a pair of slippers when they take their shoes off. Most will, however, decline.

And, yes, since I live in Scandinavia hardwood floors sans any germ housing carpets is the order of the day. With underfloor heating, of course; we're not totally barbarian