I do get a bit tired of Hanabi when the "fixated" players all agree on a bunch of conventions ahead of time (e.g., if you don't know what to do or you are forced to play, always play your leftmost card, and put your most recently drawn cards on the right side of your hand).

I much prefer the element of chaos and trying to give people clues based on what you think they, based on their individual personality, would do.

Optimizing a game is fun in its own right (my colleague even published a paper with the best known Hanabi strategy: https://doi.org/10.4169/math.mag.88.5.323), but then trying to use that strategy to play the game is immensely dull.