All joking aside, it's a serious question, esp in a house where people have health challenges already.

Don't make it too elongated, Bobert. For some reason, when the toilet is way elongated, it's hard to wipe yourself off. I worked in a store that had been built as a mostly-male sports store. The toilets were terrible. A yard long and 12 inches wide, IIRC.

Keep in mind that the older we get, the less flexible the spine becomes. That's an embarrassing handicap already, and it's worse when the toilet is fighting you.

When we remodeled, the saleswoman at Lowe's told us that for some reason, commercial places go for those long toilets. She advised one that is somewhat elongated, but not too much. It's working okay.