What makes a good restaurant a "best?" Food that's better than just good, of course. A dining room and a level of service that suit the quality of what's on the plate. A good wine list (which doesn't always mean an encyclopedic one), good beers and/or cocktails where appropriate. And then the less easily quantifiable stuff: personality, imagination (or intelligent commitment to a lack of same), consistency. For the sixth consecutive year, here are the 101 best restaurants in America.