In my opinion, don't over-analyze why a painting speaks to you over another. Just accept that there's something that "suits your fancy" and enjoy. I try to keep a list in my day-planner of artists and if I'm able to download an image online, I do so, always renaming the image with the artist's name (if available) and put it in my Favorites file. Whenever inspiration is needed, it's a click away. Here are just a few.