Easily the Wii series, but I'm also not a big fan of the Kirby series either. Other than Kirby 64 which featured some really cool powerups, Kirby just doesn't do it for me.
And every Yoshi game besides SMW2 Yoshi's Island falls into this category for me as well.
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.