This controller at JFK is usually pretty cool. There are probably 3 or 4 that you can really have fun with at JFK.
Its too bad that there aren't any feeds of ATL ramp frequencies. There is one ramp controller (keep in mind that ramp controllers are not certified anythings, they're just your average person. I don't want to make it sound like airline tower folks are less qualified, as I used to be one) that is awesome to work with. He talks fast, keeps things moving constantly, keeps the flick in his head, and the pilots really like to have fun with him. Some Cya's between him and pilots sound like minor seizures.