not sure if you were including my remark as part of your pondering, but you can exclude me.
besides, prejudice is a pretty strong word. simply not liking a musical genre is an opinion almost assuredly based on one's personal experience with it; totally different from the dictionary definition of 'prejudice'.
while i do own and enjoy almost all genres of music, i just personally don't like words of any kind--rock, pop, ballad, rap, etc--laid over classic game tunes. maybe it's partially because i don't like amateur musical production or voices, or maybe i don't find the words intriguing; could be any number of things or combination therein.
however, i do often like the instrumentals behind the hip-hop game tracks. something about the musical phrasing of the underlying tracks just works well with game music, and they often do some creative things with mixing those old sounds with new sounds.