I guess my favorite painter is Zdzisław Beksinski, but he's not the kind of artist whose stuff I'd want hanging on my walls.
Then I recalled Roy Lichtenstein, and, I don't know - I guess I would like to see some of his work in a gallery, since what I've read indicates that he tried really hard to make some of his stuff look machine-printed. And, of course, if it's going to be present in my home, it is probably machine-printed anyway. Maybe that's a mindfuck too far?
Here's one of his that I really like:

But I can't find it for sale anywhere! There is a guy in China who will reproduce fuckin' anything on eBay, but that's it. I have no idea why seemingly dozens of Lichtenstein's work is available as a reproduction, but that one isn't.