The reason I am specifically the way I am is that my first instrument was a Yamaha PSR-16 synthesizer. One of those early FM keyboards that had, presumably, some kind of 2-op chip inside it. There were a handful of sliders for user control, though they were somewhat limited in what you could do with them; it was fun to crank them up all the way and get bizarre sounding instruments.
EDIT: I should probably link the video of it I found, as it includes a number of the more interesting samples
https://www.youtube.com/watch?v=ZSdGaUylz4o
