One consistent pattern I've noticed in my hometown is that how people park is a reflection on their personalities.
At the Y where I swim, there are six ten minute parking spots, for people there on brief business. One woman, a confirmed narcissistic personality, always parks in the 10 minute parking spot for at least an hour while she works out.
(If you're going to the Y to exercise anyway, why is it so horrible to have to walk an extra 50 yards in the parking lot?)
Another indicator is when people will straddle a line, effectively taking two parking spaces for their car. I see this on a fairly regular basis, and can't help but think how selfish (read: narcissistic) that is. Sometimes it's a befuddled old person parking this way, in which case you have to cut them a break. But usually it's a huge SUV driven by someone with a commensurate ego.
In New York City, the narcissists express themselves slightly differently -- by double parking. If someone wants to get out while their car is boxed in, too bad.
At Costco, people sometimes see someone else loading up their car and will wait for a couple minutes for them to finish packing and leave, so that they can get that choice spot. In the meantime, all the cars behind them have to wait those couple minutes as well. Similar behavior.
Any time anybody essentially says, my time is more valuable than yours, it's narcissistic behavior. And anytime anybody doesn't stay within the lines, they're saying the rules don't apply to them.
Which together are a pretty good summation of the syndrome.