I remember reading a Jennifer Aniston quote that one of her pet peeves is when people hang their toilet paper the wrong way and she actually feels the need to turn it around and does. "If you have it under, sometimes it flies off. I will change the toilet paper if I'm in someone else's house and the paper thing is under. I'll always flip it." Frankly I never thought about it until I read that (so thank you JA and I mean that!) . The example on the left is the right way and it's called the waterfall method. Found this great piece in Apartment Therapy Right is on the Left!
HERE and instructions on how to