I would have to go with quality. As far as possessions or buying something, it depends on what you are buying and what you need it for.
When I seen that question, I did not think of objects. I may be an odd ball, but I thought of my friends. I guess a good example would be Facebook. I have less than 25 friends on my facebook. All I have known for over a year and know their character. I know the things they post will not be full of drama, or bad stuff. I see enough bad in the world at my job,on the news, and just out and about. I choose to have a few great quality friends over a quantity of iffy friends.