I like my chords rich. Perhaps I could write some modern soul or perhaps jazz. That's the feedback I got from the game. I don't know too much about the real songwriting game!
There's a nice book on smooth jazz piano by Mark Harrison. He discusses the basics of smooth jazz piano. He explores the piano style of the Rippingtons, Brian Culbertson, Jeff Lorber, and others and transcribes a few bars of music in their style.
Smooth Jazz Piano