Phil,
Check out the styles and voices available at
www.psrtutorial.com , SVP World, and tons of other sites and you'll have more than enough to satisfy anyone's wishes. If you were to download all the style files alone, and put one song with each file, you could play nonstop for the next decade and still never reach the end of the list.
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)