How many floors do you put into most of your home builds?

I didn't vote, cause I don't really "build" anything. I usually start off with a one or two story home downloaded from the gallery. However, as the generations go on, I sometimes end up expanding quite a bit. Sometimes I move the kids out when they age up, but sometimes now, so when there's a full household I often end up building up, or down, or out from the initial build. One vampire family of mine has been on the same tiny lot for ages...but they now have three basements ;-P