Game system pet peves

Button names and colors.  Sony got it right, don't use letters or colors.  Well, they use colors but most people know the buttons by the shapes.
I mainly blame Microsoft for going against the grain.  Their letters are opposite of Nintendo (swap the A/B and X/Y) and their colors are opposite of the dreamcast.  I sometimes confuse colors because I have the Dreamcast controls engrained in me.  I sometimes mess up the A button on the 360 because of the DS and Super Nintendo.