The 9 stroke roll is pretty inescapable, it's just 1 count worth of duple roll. Everyone needs it, everyone loves it. Play "1-e-+-ah-2" and add the diddles. Make sure you've got a solid fulcrum with the thumb more on the top of the stick than the side (no gap) and you'll be able to play them with less squeezing and better finger control. Beyond the 9 stroke roll it's just numbers, so do some math and name it if you feel so inclined.