Shadow of Colossus had a GREAT theme going on. It's flaws, however, took away from overall gameplay entirely. The framerate in this game is definitely below 25 fps...hell, I wouldn't be surprised if it was below 10 for crying out loud. Especially when fighting the colossi, the framerate takes a giant nose-dive on graphical-heavy parts. And another thing...I don't see what's so great about the game's graphics. Sure, they're decent for a PS2 game, but both FF12 and Valkyrie Profile 2 have better graphics and neither of those games experience mass slowdown. Even Resident Evil 4, with all of the crazy things happening on screen at once, topped with incredible graphics, doesn't experience slowdown that SoC does. It's disappointing really.
I have to give credit to SoC's music though, it's enthralling.