A Peter Storm attitude is a lifestyle choice. A no nonsense, often corner cutting, bargain bucket, reduced to clear approach to life which often results in sub par results but sometimes results in the jackpot!
E.g. Haggling on price for already reasonably priced items and/or purposefully taking the display model because price can be negotiated.
E.g. Refusing to pay for allocated seats on a plane but ending up with the seats you wanted anyway! They Peter stormed that!