The Xenosaga Series and Xenogears as I consider it, are love-hate games. If you're not much into a huge storyline for a game, then don't play them. I don't see how anyone can call Xenosaga overrated. Just look at the reviews of the first two games. People are always calling down on it for its long cutscenes and that's why it never gets a high rating.

As for Xenogears, you can make that fact that it's overrated, but I'm going to go ahead and say it's not as well known as some people think. There are those hardcore console RPG players who don't visit online forums like these yet have never even heard of the game.

Halo I've always thought was overrated, but it's value is solely based on its replay value and its multiplayer value.

I thought FFT was overrated, but I'm too lazy to back that up.