Temperature controlled wine lockers in a central location, bike storage lockers, shoe racks with down lighting, cedar-lined hall closet (incredibly easy to do), pull-down drying rack in the laundry room (behind door or above dryer), radiant floor heat, energy usage monitors, two dishwasher drawers instead of a regular drop in dw.
...and NO WINE RACKS ABOVE THE REFRIGERATOR, that only ruins the wine!