But really, EQ wasn't designed to do "post production" of your music. It's there to compensate for your listening environment's unique acoustic characteristics. If you don't like the way your music was mastered and EQ'ed, I guess EQ's per song is a good thing to have, but who wants to spend that much time EQing their entire collection? EQ is supposed to be a "set and forget" thing, and all of the crappy head units that offer "Jazz" "Classical" "Rock" EQ's are a solution looking for a problem, if you ask me.

But if enough people want it, hey, throw it in there... Just don't make me set an EQ for all my songs.