I just talked to an LO that I really respect and found my place in the APA. She is allowing me to come in as a 7/9 and said I am allowed to miss as much as I like. I think I am going to love it there.
I am sure this bothers some, but I like to let one rip silently when you miss and let your opponent walk into it.
My biggest is when people feel they need to bore a hole in the chalk with their cue.