My step-daughter and her DH bought a lovely new home..with one of those huge, space wasting high ceilings that makes her stair way so frightening to me. And what a waste of space and heating!!! And on the second story there's small "conversation" area that drives me crazy because I keep hearing the voices from the bottom floor.
Also, since she's getting older I don't think either of them would get a second story house again, should they ever decided to move.