I loved Mario Kart for SNES and N64.
After that, Nintendo seemed to have no idea what people even liked about the games.
They added more characters, more cars, and more level interference, meaning that you were competing less and less on skill.
Worse, your choices for character and car could have enormous and difficult to predict effects on your performance.
After the N64 game, I found that series to be astonishingly boring. My one friend who enjoys it can't find anyone to play it with him.