I live in a sunny, spacious one-bedroom apartment on the Upper East Side that is the perfect balance of central and secluded. The bedroom is furnished with a queen-size bed, and the living room sofa pulls out to a comfortable full-size mattress. I keep an air mattress for a fourth guest. Large windows in every room ensure the apartment is sunny the entire day. The apartment faces away from the street, so it stays quiet. The unit has its own washer and dryer, plus AC and wifi. John Jay Park is one block away, and its pedestrian bridge crosses the FDR to the East River Esplanade. Carl Schurz Park and Gracie Mansion sit five blocks north. The 6 stops at 77th Street, and the Q stops at 72nd and 86th Streets.