In my experience of Rock, Paper, Scissors, no-one ever picks Rock the first round. Maybe it's because it seems lazy, maybe it's some other reason. Anyway, for this reason I always go Scissors (apart from when playing someone who really knows my style). And I ALWAYS win. Or draw.
I have a Gumbie Cat in mind, her name is Jennyanydots; Her coat is one of the tabby kind,with tiger stripes and leopard spots. — T.S. Eliot, Old Possum's Book of Practical Cats