Well anytime you get a long awaited sequel to a cherished classic game or franchise, the disappointment probability is always high.
Yoshi's Island DS was a pretty big disappointment, I must say. Uninspired level design compared to the original, the switching between babies thing was annoying, TERRIBLE music, and the collision / jump detection always seemed a bit off.
DKC Returns was also disappointing for me, mainly for removing the iconic Kremlings in favor of generic baddies, the ridiculous amount of mine cart / on rails levels compared to the classics, and the fact that some levels are nearly impossible without Diddy's jetpack, and with him as a mere buddy sidekick this time around rather than a fully playable 2nd character, that creates some problems.
Also Banjo-Kazooie: Nuts and Bolts... for obvious reasons.
On 2/24/13, MB1025 said:
You know I was always wondering why no one ever used the dollar sign for $ony, but then I realized they have no money so it would be pointless.