Guitar Hero World Tour. I didn't think it was possible to mess up as simple a concept like strumming to plastic guitar, so naturally Activision had to put together the most lackluster set list possible. (Or so I thought, everyone says GH5 is even worse) I recently sold it on Amazon...for about $10. *sigh*
That put me off the whole 'plastic instrument' thing for a while, until I played Rock Band 2. Harmonix, thank you. Just thank you.
Oh right, I almost forgot about the WiiWare version of Phoenix Wright Ace Attorney. However, I only got it because it was the only game in the series I didn't already own. But that still doesn't make it any less painful that it's such a lazy, half-assed port. Seriously Capcom, you couldn't have even added pointer functionality?