I'm curious about the looking good part.
If you're using a case, you're covering up the device. So why does the whole 'looking good' part matter? Oh sure, I understand protecting against cracked screens, scrapes, etc. Is that what you mean really? Because a case is going to cover up scratches and dings just as much as it's going to cover up 'looking good'.
Do you sell or trade in your devices? If so, is keeping it looking good only to get maximum value for that? I mean, if you don't, then what is the point of keeping it looking good if a case prevents you from seeing how good it looks?
Or do you periodically pull it out of the case to make sure it still looks good/admire the good looks of the device? Is a case being used so you can enjoy that moment every once in a while?
Or did you really mean you use cases to protect your device so it doesn't get beat up? That I get, although I've never understood just who it is that case users keep their devices pristine for - when a device is never out of it's case?
I guess it's just me. I don't have it in me to keep my devices looking great so the next guy can enjoy what I did not.