Hmm, thinking about the decision fatigue effect, I wonder if along down the line a Tropo Adjustable could be a thing -- pick your print size in a range from smallish to large (with the whole range tested to make sure that nothing breaks), pick the main color (it's a pretty limited color scheme, so pick the main color and then the rest could be calcuated), and maybe even pick your contrast level for the type vs. the background from a limited range (I like the not-quite-black and not-quite-white, but I know at least one person who needs high-contrast black on white or she gets eyestrain). And it would be set at a nice default.