Looking back, my best daily drivers were the cars you would least suspect. I had an 1978 Olds that was hands down the most forgiving car I've owned (circa 1990). I drove it through the hills of northern Michigan, where 200+ inches of snow and sub zero temperatures were normal. I camped with it, mountain biked, wind surfed... My sleeping bag even fit on the hood. It was ugly, rusty, ran on crappy gas, never burned oil and carried a class 3 trailer hitch. The suspension would compress to the right if I goosed the 350 V8 in park. The suspension was awful. but the stereo rocked. Ahh I digress.
My second favorite DD was my 1996 Land Rover Discovery. Everybody told me it was supposed to be a POS, but never let me down.
I suspect what makes a good DD is a willingness to like a car for what it is. To remember what you did with it, rather than what you did to it.