Melodies can be good depending on the context. You can have a simple melody, and if the harmony behind it is interesting, it can make a very simple melody really different. You can also have a complex melody. The more complex it is, the harder it is to sing, and then sometimes it can sound contrived. You could write a melody that would be fine on a saxophone but if you give it to a singer, it can sound raunchy.
Donald FagenI had a dream that Britney Spears rubbed her breasts in my face and Jennifer Lopez gave me head while Salma Hayek sucked my toes and the Olsen twins videotaped everything. I would have kept dreaming it, too, if I hadn't set off the smoke detector.
Donald Fagen