I adore Xenosaga and think that the first game in particular is really great.

Most overrated games, if I don't just list all Bethesda titles in a row:

1. Fallout 3 (alright gotta include one)
2. Ocarina of Time
3. Final Fantasy X
4. GTA V
5. The Last of Us

Now let's be clear, saying they're overrated is not saying they are BAD (although I do think that in some of these cases), merely that the perception of them is off.