I guess if you grow up playing snooker you are forced to groove that dead straight stroke. I think snooker is lame though. They literally have to practice 8 hours a day to keep that stroke straight and the champ is usually the guy with the straightest stroke and the best cue action. I believe pool is more skillful in the sense that you need the knowledge of shots and shot making but I have to give it to snooker players, their strokes are as straight as they come.