We have a pretty cozy 3 bedroom apartment now... ideally I think we'd have an extra room as an office/den. But I actually have come to appreciate smaller spaces. In larger apartments, we definitely spend more time apart doing our own thing... which is great for each of us, but maybe not so great for the family unit.
So in a perfect world, our apartment wouldn't be too much larger than our fairly cozy 3br. I'd tell you what the square footage is, but I actually don't know it!
What's the square footage of your ideal house?