I personally think it is all right in small doses, however listening to it for ages can get annoying. However, I have been lead to believe that it is getting old as I have seen T-shirts in dollar stores with Gangnam Style on them, and you know something's getting out of date when you see it on a T-shirt in a dollar store ;)
This guy, Psy, gave a concert shouting that his audience, North Korea I think, should kill Americans, including women and children. He threw down a model of an American tank and stomped on it. The minute I heard that, I do not like any of his music and never will.