Some men my age purchase artwork for their homes at Sothebys. I find that the cultural works and artifacts for sale at a comicon are far closer to my tastes.
Viz this great show poster by Phil Noto. I take some small pleasure in a piece of art on my wall that represents an intersection between two people or things whose work I love. My David Bowie concert promo poster (pulled from the side of a building outside Macworld Expo) is another example.
Phil's art style has familiar notes from classic magazine illustration but he's clearly taken it into his own, modern direction. I've been an avid fan for about a decade, when his art started showing up in art discussion boards.