I'd say laundry is very high on the list. Kitchens are important to a lot of folks these days. There are tons of foodies out there, and everyone probably appreciates a nice kitchen. Some people (like me) don't need that much space, though, and would prefer to have more living space if given the option. I'd prefer a one bedroom place, but that can get expensive if it's a large space, so a two bedroom might be a little easier to afford.