Overrated:
Super Mario 64
Uncharted series (love it but till overrated)
GTA 4
FF13 (yes i know it's not really liked, but I just think it was that bad)
Resident Evil 4 (Probably just me)
Ocarina of Time (love the game, not close to being the best game ever. Probably for its time though..)
Underrated
Prince of Persia series on the PS2
Super Mario Sunshine
Wind Waker
Mario 3D Land