XIII was funny at time. And if Vanille pulling wool off a sheep isn't a quirky moment, I don't know what is.
But yeah, the games have become more serious. I would say XII was more serious than XIII, but that's just an opinion. But then, I don't remember X being particularly funny. And some of the scenes they did try making funny fell very flat.
But realism does mean that humour has to be toned down a lot to not just be people doing quirky things, but having funny dialogue.
