Actually, I don't. That's because I avoid parking lots and such with my truck. Many a person, no manner what age and background, don't give a flip about the edge of their door taking your paint off your ride or re-sculpting your sheet metal below that paint (notice I used the word "Your"). I have even seen this happen at car shows, where the paint on numerous rides can cost as much as $10.000 or more and all it takes is one swing on an adjacent door to destroy that paint job. If and that's a big "If", I am forced to do a grocery run when we are on the road, then I look for a blocker car in the back forty. Most likely someone who takes pride in their ride (Corvette or Mustang owner). Here the owners initiate a little more care about their ride and yours. So, looking at my ride is mostly useless because of the blocker car. Why a blocker car you say? Well, as far as parking in the back forty, it doesn't work. Little known fact that immature little twits enjoy playing torpedo with shopping carts.
You might say, I am a little over-done <polite usage for anal - with this, but that's alright. I had a 2008 1500 till last April and I didn't have a single scratch or door ding on it. My paint! My sheet metal!
As far as looking back? Only when I know it's safely in my yard or my garage. Then I start seeing dollar signs on what to spend on it next!