Hardwood in bedrooms, living/dining.
Tile in bathrooms, kitchen, laundry.
Carpeting no where. However, rugs where appropriate! [Note the distinction, to me, between carpeting and rug!]
This decision was partly because I have always lived in a house where hardwood floors were prevalent. However, never in a kitchen! [I think my Mother would have been so scared that something messy, "toxic," or staining would happen and ruin her kitchen!]
Many of my TV friends are challenged by breathing problems, usually brought on by years and years of smoking! Some of them have ripped out all carpeting because it tends to harbor things that increase breathing problems! Worth considering!
SWR