I fell in love with the original Track Mania Nations - Later I played TMN Forever and upgraded to Track Mania United.
I love playing the classic style Stadium maps in my F1 style car.
I also find the drifting maps quite enjoyable and challenging
...I tolerate the rollercoaster'ish maps, but the car handles so well that rarely necessary to consider the brake

But i absolutely hate every time I have to play the maps while driving in the beach buggy... And I often quit the game for months when I reach such a section until I return having forgotten why I quit

WHY?!?! Why do I have to play through a part of the game so fundamentally different from the rest of the game AND GET GOLD to progress to a more enjoyable part of the game. You could've easily made 4 smaller campaigns instead, but CHOSE to go for the forced-hand approach.
Me thinking before I even play: "Is this game really worth it" because I reached such a map and have to get GOLD before I can progress to something I think is actually fun... That is objectively bad game design.