Possession has its roots in insecurity. The more deeply you attempt to grasp something , the more insecure you are about it, and about other things. It also generally means you are avoiding dealing with other important issues, and want the pleasure and excitement, fleeting though it always is, associated with awaiting something that you desire. For some, it is an over-the-counter purchase (instant), while for others, it is awaiting the package from a shipper.
Purchasing is an act of power, but as most of us know, it has, or ought to have, limitations…not the least of which is a firm commitment to a budget.
So, yes, personality is an important factor. So is the addictive component associated with intermittent reinforcement, such as the occasional win one gets while gambling…or the occasional arrival of a desired package in the post.
It is a small wonder, then, that some of our friends have a compulsion to re-acquire the ephemeral pleasure that one gets from a purchase, and that they will do this time and time again, even at their peril. The stark sign of such a thing is the drawers and boxes of unopened, seldom used, and simply hidden railroad items that number far more than they can rationally use.
I have had other intense interests, but due to family finances, never gave in to seriously incautious or purely self-centred spending…thank God. Now, on the other hand, I am retired, making much less, and am hanging on by the barest molecule at the end of a single finger nail.
…aaaand loving it. [:D]