Okami. This got big raves from the media when it came out on PlayStation 2, and my little brother (whose taste I ordinarily have the utmost respect for) enjoyed it. Then it came out for one of my favorite consoles, the Wii, and all the critics said the Wii version is even better than the original. So I got it.
Where to start? How about the fact that half the game is quick time events? I actually like quick-time event games if they're well done, but even I would admit that the appeal of a good QTE is in the cinematics; there's nothing intrinsically exciting about performing a predefined sequence of control inputs. Okami's QTEs are just about watching plants grow. How can you get any more dull? Simple: By using some of the most inaccurate motion controls the Wii has ever seen, thus requiring you to restart each QTE 20 times over.
Speaking of which, the controls make most of the special moves impossible to execute. One move requires you to swing the Wiimote three times in quick succession - in theory, at least. In practice, the game won't read a motion if you do it 1 second or less after another motion, and restarts the combo if you take longer than 1 second. So the only way to get a succession of two swings is if you get a control glitch which misreads a single swing as two swings; three swings simply cannot be done. I was at this for an hour and finally had to restart the game because it won't let you leave the tutorial until you perform your new move correctly. Seriously.
Then there's the endless, monotonous, utterly pointless battles. So long as you don't stay in one place for more than five seconds, you'll dodge every attack, and even the most basic enemies take such a ridiculous number of hits that my arm was sore from swinging the Wiimote after just two battles. After a while, my arm muscles would actually clench in anticipated agony every time I got caught in a random encounter. Obviously this wouldn't be a problem in the PS2 version, but the dull repetition of having to hit easy enemies with crude attacks over and over and over would be the same.
When I finally gave up on this game and sold it, I was about 40% of the way through. Usually I complete every game I play, unless I absolutely cannot manage to progress. Okami is a rare example of a game that I stopped playing simply because I couldn't stand it any longer.