Two story homes have there place, perfect for families in my opinion. Our daughter has her own level and quite a bit of privacy and so do we.
Two story homes can be cheaper per sq ft to build, it's typically less expensive to build up than out.
You'd hate our "upside down" house, Fenders. The master bedroom, kitchen, dining and living rooms are all upstairs. This is very common in our area, the views from the upper level of the surrounding hills and lake are awesome.