Missing what most of the time? The babbling faceless agora, the fame, the parties, the pop of flash bulbs? The lovers, the gaiety, the champagne? The solitude carved out of celebrity, poring over charts by a single lamp on a wide desk in a venerable hotel? Room service, coffee before dawn? The company of one friend, two? The choice: All of it or not? Some or none? Now, not now, maybe later?