Hi Chris,
I do mostly Country/Western, Old time R&R, Blues and standards.
Nobody has enough authentic country/western styles, though Yamaha has made great strides in that direction.
I'm sure it's not the case with everyone, but I have little use for all the Disco, Rap, House-type styles.
I miss the great selection of Big Band styles that Technics has.
10 styles to survive;
1. 4/4 rock n'roll, with and without walking bass (Johnny Be Good)
2. 6/8 ballad (Unchained Melody, etc.)
3. Simple Waltz, suitable for CW or standards.
4. Blues Shuffle (Kansas City, Everyday I Have the Blues, etc.)
5. Swing/BigBand Slow and Fast (maybe that's two)
7. 2/4 country. (Good Hearted Woman, Johnny Cash)
8. Country shuffle with and without walking bass. (Ray Price, Merle Haggard, George Strait)
9., 10. 4/4 ballads, Country and pop
Now, if you JUST had these styles, they would need very simple backgrounds on a couple of variations, so they could be used on a variety of songs. Yamaha is good at this.
Good luck on the new keyboard.
Did you get my email at GEM?
DonM