Let us imagine a cataclysmic situation that would involve the loss of all material possessions, but this hypothetical situation allows you the ability to rescue one (and only one) painting. Ideally, you would want to rescue the one that speaks to you the most. Sure, you could opt for an "important" work. But why do that? Don't waste this opportunity being a martyr for humanity. Be selfish.
In this situation, the painting you rescue will be added to a collective art gallery for our dinner guests. So, if someone has already rescued your favorite, you can (and should) choose your second (or third, or fourth, etc.) favorite. I can't wait to see The Dinner Table's museum of art.
As for me? This is one of my all-time favorites... but it was so, so, so, so, so hard to choose just one.
Van Gogh's Olive Orchard (from his Olive Trees series):