Tiles are too hard! Although they stay nice and cold during hot weather, so I do like them in some places. This house has none at all.
I bought an Aunt's house in my hometown, and two rooms are wall to wall, grass green, medium-pile, carpeted. It's now polka dot, thanks to the puppy I got nearly three years ago. I don't love it, but my dog sure does. She can run and play on it easily, and more safely than hard wood floors. It might be time to get rid of it. I'm pretty sure there is very nice oak under it, maybe even chestnut.