The main thing is that games are meant to be fun. It's their primary job. Graphics don't actually make a game fun; they just wow us and draw us in for the initial purchase. Icing on the cake, in other words. If, upon removing that icing, the cake is still delicious, then you have a good game. But if, upon removing the icing, you discover that you were actually eating bread and not cake, that's a problem.
I highly advocate playing games on PC with graphics settings at the minimum at least once, so you can find out how good the game actually is without being blinded by the overdone visuals. You may be shocked to find that "great games" suddenly aren't so great. Many FPS titles suddenly become blocky and uninspired, RPGs reveal their darker side of having extremely tedious and clunky leveling as well as horribly dated one-click combat that would shame most MMOs these days, and a great deal of action games suddenly feel very stiff and unresponsive, with incredibly short-sighted and unintuitive design decisions popping up regularly.
Sky Render - Sanity is for the weak.
