In the past, I've bought cars that I liked the look of or the way it performed or for certain features like heated seats/nav/bluetooth. My current car met all criteria but I forgot to check the audio system and it has such a bad stock system. I've also tried aftermarket DIY and professional solutions but they aren't great either. Nor does it seem sensible to spend �3k on an aftermarket installation that I'll never see a penny of at resale time.
I'm not sure what your point is but I guess we all have our priorities.