Yeah, see we've got years and years before we outgrow this house. But we'll grow bored of it long before then. The family before us (that I nannyed for, so i spent time here with them as a family, and saw how the house was used) has three children, and even then, to me it just felt cozy, not totally cramped yet. But it really is only a 3 bedroom, and the room that is currently Tenleys is pretty tiny. She could share it with a sibling, but only because once we're finished renos there will be a playroom downstairs. It's too tiny for anything more than sleeping if you put two people in there. The only other room is in the basement. I don't want to put kids down their alone until they're quite a bit older.
I used to LOVE the idea of two stories, but I think it was mostly because we never had one, and to me, they seemed like the 'rich thing'. Now, I really couldn't care less as long as the other points are there!