Yamaha PSR-320: The one they don't talk about...

Old PSR keyboards are often great fun with lots of features and sounds that can still be used in a creative way. I had to struggle not to actively dislike the Yamaha PSR-320 though. It's full of promise with lots of experimental ideas that may have been innovative in the mid 90's, but now it is dated to the point where any charm that it once had is pretty much gone.