The Ultimate Powers Book for the old Marvel Super Heroes roleplaying game seemed like it was specifically designed to help people create characters of that kind. It had a set of random tables in it on which you were expected to roll for origin, body type, stats and powers. This invariably led to the most ridiculously mismatched and incoherent character concepts a roleplayer ever had to try and fit a backstory and personality to. I remember once rolling up a cyborg humanoid-avian hybrid whose principal powers were Cosmic Awareness and water breathing.