The makers of a new iPhone app called Goggle Eyes did a survey to find the most-annoying hand gestures. Here's the Top 10, starting with the most annoying:
#1.) Using your fingers to make "Air Quotes".
#2.) Talk to the Hand.
#3.) Tapping the side of your nose to say "none of your business."
#4.) Blah Blah Blah. That's when you open and close your hand like a mouth.
#5.) Finger Guns.
#6.) Hand Punch: You hit your palm like you're getting ready to fight.
#7.) Pointing to your eyes and then another person to say "I'm watching you."