Ours is 2754 square feet, we don't use the upstairs too much now that the kids are grown, compared to all of my relatives we have the small house...

Our last home was 1600 square feet, I think you tend to grow into the size of the house with "stuff" I think 1500 is plenty big and you won't pay an outrageious amount to heat and cool the house.

My sisters home is 5000 square feet for her and her husband and one little rabbit....