Shoes or boots outside because they're necessary. Proper hiking boots for hiking, armoured wellies for chainsaw work, running shoes for running, something smart and formal for smart and formal occasions, casual boots most of the time and no outdoor footwear indoors because that's dirty.
In the country, where it's quiet and there aren't so many cats and dogs and rats and pigeons and other people and so on, I'll go outside barefoot. If you can walk 150 miles in a week in boots, you can probably handle a mile without boots too. Of course, if I'm going somewhere muddy I wear shoes or boots so I can take them off again and leave the mud out of the house.
No heels and no open toes for me, though. Hobbits do not have pretty toes and do not paint their toenails, and high heels are silly. Their sole valid use is as a legitimate weapon to carry to and from the party while wearing running shoes to improve your chances of not needing a weapon. You can't run or fight in heels and that "tick-tap tick-tap tick-tap tick-tap" sound is like an exhausted seal pup splashing in the surf, a signal that there's easy prey right here.