Want some controversial opinions? Okay:
Super Mario Sunshine is a pretty flawed game. Good, but nowhere near as good as some people like to make it out to be.
Super Mario Land 1 on the other hand just plain sucks. The physics are terrible, it looks bad and frankly, the setting and music are the only decent things about it.
Super Mario Galaxy 2 is better than Galaxy 1 in pretty much every way.
Wario Land 4 is better than Yoshi's Island, Donkey Kong Country 2, Super Mario Bros 3 and Kirby Super Star.
Mario Kart 8 is overrated.
Super Mario Maker is... kind of mediocre compared to any fan made level editor.