I don't know how you would expand your horizons if you were in control of your intake, especially since being self-aware and fair/honest in your self-assessment is, um, HARD for the average human being.

Exactly! And yes, there is no way to predict what may or may not upset people. Personally I'm upset when people add stupid skater-boy scenes to classic fantasy (I'm looking at you, Peter Jackson) but am I going to go all emo about it?