I like to mix and match a bit. For instance, I might start out with a basic style, but then add flavor from other styles to bring it to life.

For instance, you can take a straight ahead slow jazz ballad, that might feel kind of turgid by itself, and add a blues piano solo to the entire track using "Soloist", and suddenly, the phrasing introduced by those piano lines makes the track feel more lively and "cool".

Variations on this "mix and match" idea can give you endless variety. You can get even more specific. For instance, you can choose a style that emulates Bill Evans' left hand on piano for the "Piano" track, then add something that sounds more "Harry Connick" for the right hand in the Soloist track.