the one that does my head in completely is the fact 90% of players insist on using the smallest denomination chips they have. It slows the game down and is just complete stupidity. It should be a rule that your bet must be made using as few chips as possible or you are given a warning, a time penalty, disqualified, a kicking in the car park, shot, shot in the eye.
agreed, along with those that stack up their chips and then push them over as they cross the line, just for the dealer to pick up again.