My absolute favorite thing in 9B is shitting it in. I don't like 10B but if my opponent grumbles about it I'll say "That's why I play 10B for money." Which I don't but it's a funny thing to say. If my opponent shits it in I honestly don't care because I can do it too.
I also have a lot of fun trying some super low percentage shot on the 9B while simultaneously playing safe. Free rolls are fun, especially if they get you BIH afterward. This tactic is especially fun to use on the 500-550 fargo players who think 10B is the only legitimate rotation game, but couldn't run one rack of 9B/10B out of 30. For some reason they hate the idea of slop or creative percentage play but win no more games in a call pocket game.
I swear if I saw normal "easy" pattern routes the way I do slim chance weird ass 9 ball rides I'd be a dangerous player.