Here are the top 3 reasons that I have printed a half-dozen paintings and taped them to the office wall facing my desk. Each print is between two and five inches in each dimension.
(1) My sister Gina is a trained artist and I've received from her a refined appreciation for artwork.
(2) In most of my work, "good" is defined objectively and precisely, e.g., by exceeding a numerical threshold or satisfying a set of criteria. I think that the art on my wall is also "good," albeit in a totally different way, and I think that this balance is important.
(3) I've chosen a few paintings, like "A Farmer's Garden in Simsbury" (Thomas Worthington Whittredge, 1875), which express work in a way that balances my work in a different way. During the day, I don't till the soil or pick out weeds. But I like to recall the connection between such physical toil and my own intellectual toil.