8 ball is easiest, for me anyway. I went from 200 to 700 in pretty much a few hours and it was relatively easyfor me. Keeping my one ball was tough because I lost it a few times to flukes from Matt and Baked Potato Boy. Recently though, it feels as if 8 ball is becoming very lucky and if your in a mood, games can swing away from you.
9 ball which is the most annoying game of the three is also easy to gain points. If you stay patient with it, you can get to 600 with relative ease. But like I said, you have to be patient.
Snooker is most difficult and I find it most difficult to gain points because I am very impatient. It's clear that skilled players find it easier to gain in 8 ball and snooker while the rest prefer the lazy game, 9 ball.