You should include socio-economic status in your criteria. I will say that people,(mostly men actually,lucky since they're the only sex it's ok to generalize about) who possess a certain character trait and a certain level of economic success tend to buy Lamborghinis, Ferraris, etc. not for the way that the car makes them feel but for the way that they think it makes others feel. People who possess this trait but have insufficient means to buy the car usually end up keeping big fish that they can feed live feeders to. Piranhas, Red Devils, Oscars, etc. I in no way intend to demean these fish or the people who keep them, but I put more credence in my own observations and my analysis thereof than any other source of information.