The best license plate is the one they give you that doesn't cost extra, lol.
Although once I got 223 KXN which is cool, because 223 is a caliber and KXN is close to KEN, but I don't know why but I stupidly didn't keep up with that plate when I got a new car. Now to "reactivate" that plate I would have to pay every registration for every year in between then and now, lol.