Need to catch up, I am a major slacker!
#13: All the STORAGE! All the cabinets in the kitchen, the kitchen pantry, 2 linen closets, and the unfinished area of our basement. Not only that, but we have a "nook"/ bump out in the garage that stores the riding mower, extra outdoor chairs and more! Compared to being all smashed up in our townhouse, this is truly amazing! Of course we have managed to fill most of it thanks to our 2 little boys!
Along those same lines...
#12: His and Hers Closets!! One of the greatest features. My closet is so big and has a window in it. It could easily be converted into a study, but then I would lose my own personal closet space! I also really like that they are not in the bathroom. Don't ask me why, I just like them outside of there!