How many levels do you prefer when playing in a house?

Simple single story houses are best to play in for me. It's hard for me to keep up with what they are doing on separate floors. I'm more likely to play a two story house on a single sim family.

I always prefer single story homes because it's easier to keep track of my Sims, but depending on the lot sometimes it's necessary for two. I never ever play more than two levels though.

Single story. I like to add in a shed that leads to a basement if I'm running out of space, but for some reason I don't have nearly as much fun with a double or triple story! Maybe it's because I like to micromanage my Sims and know what they're doing at all time, I don't know.. :T