I wear a pair of black soft-footbed Floridas as house shoes in the spring and summer. I have a pair of blue suede soft-footbed Bostons on order and will see how they work as fall-winter house shoes. And I have an older pair of silver regular-footbed Granadas that I use as travel slippers sometimes (they're narrow width and my wide, high volume feet are more comfortable in the regular width; so the Granadas have been relegated to occasional wear when visiting relatives, etc.).
I like Birkenstocks for wearing as house shoes. But I don't find them comfortable to walk in. For a similar style of sandal for walking, I much prefer the Mephisto Helen Plus, which has a slight elevation in the heel that makes walking easier for me.