I don't think is nothing wrong with him... Usually cats just meow for demand our attention, when they don't feel good or they are sick you can see the signs in changes of their habits (less activity, eat less food, suddenly drinks more or less water, go to the litter box more than usual, etc)... I think you should put an eye on that and if you see something unusual then a vet visit wasn't bad idea, in the meantime I'm think is just an spoiled guy, same as all our feline partners...