I could live with 8 basic styles all night. I set up that "EZ eight" bank in the PA80 and it's my "Go to" styles. Given that I play lots of manual bass lines, the styles are not repetetive, and they cover 95% of what I play.
The 8 staples are:

1)8/16 beat (works for ballads and rock)
2)12/8 SlowRock beat (thousands of tunes !)
3)Disco (handles Motown to Madonna)
4)Shuffle (Louie Prima style, R&R!)
5)Latin (Basic bossa goes a LONG way)
6)Swing (cool, jazz beat that swings)
7)Polka (doubles as a 2 beat country beat)
8)Waltz (3/4 - gotta have it

The first beat is actually a DUAL beat by using the multi pads. I press one button to turn OFF/ON the latin persussion that turns the 8 beat into a 16. Two patterns in the space of one !