Large closets, large closets and large closets. Have I mentioned large closets? Oh, and a garage. The only two things I miss not having in this house
And put the W/D next to the bedrooms, not in the basement/garage/etc.
Make sure if you like open windows, you get windows that open. They just built a house next to me with mostly fixed (view) windows and french doors. I'd rather have windows that open and sliding glass doors with screens.
AND DON'T SCRIMP ON APPLIANCES AND HVAC!!