* Comfort (seats, ride, low road noise)
* Economy/environmental impact (next veerhickle will likely be electric/hybrid, this one does >50mpg combined)
* Dog carrying capability
* Can get Radio 4
* Hands-free phone/bluetooth
* Motorway performance (i.e. can I safely overtake things, like I couldn't in the hired Vauxhall Corsa I ended up with a couple of months back. Great little town car, but you absolutely had to stand on the gas to get it to do 50-70 (i.e. overtaking an LGV) and even then it felt like you were out there for ages)
* Price/TCO (the latter is more important, tbh; I don't spend much more than £5K on a car)