What is your least favourite Mario game?

[Evil Yoshi Toes]

Disregarding the obscure and laughably bad games like Mario's Time Machine and Hotel Mario, I'd say my least favorite game is Sticker Star. I don't think on its own it would be my least favorite, but it was just such a huge let down that I can't enjoy playing it at all. That Mario Tennis game on the Wii U was garbage too, and so was the Mario Party.