I live in a flat complex, where every flat has one car parking space. There are about 12 visitor spaces. As you can imagine, many people park their 2nd cars in those visitor spaces constantly, so there's almost never any opportunity for visitors to actually park. They are all 1 or 2 bedroom flats, yet some flats seem to have 3 cars....
It gives me rage when I come home to find someone else parked in my space... but luckily mine is kind of in a corner, so I park them in, and leave a note on their car. Sometimes I come and answer the door immediately - sometimes I don't. They don't do it again. 
But, anyway.... yes, for me, it was important that I bought somewhere with parking, as I'm practically in the town centre. If I moved a street away, though, to the beautiful Victorian terraces, it's on-street parking, and a bit of a 'mare, despite it being residents permits.
I think back to when my siblings and I lived at home in our mid-20s, and at one point (shamefully), we had 4 cars for 5 of us. My parents both had a car (both worked shifts, which made sharing or public transport difficult), my sister and I shared a car, which worked ok, and my brother had a car, because he likes cars! Oh, and occasionally my dad had a work vehicle, if he was going to a specific site which needed it (worked on windfarms). Our neighbours must have hated us, as only 2 cars fitted on the drive.