I really like the way Diablo 3 looks but I kinda do wish it was darker and more detailed. So I decided to give this darkd3thing I've been hearing about since beta. I chose balanced settings with effects on and shader on. It took a little while to get used to but now I don't think I'll ever go back. It really does make environments and characters look more detailed and everything looks less washed out. It's really nice that it's easy to toggle on and off too. Here's some screens, click to enlarge as it's a pretty subtle difference. It even makes the character select look better!
The difference really does stand out when playing, at least to me. All of these screens are with all settings on high and I just toggled the shader on and off. Wondering how many other people on GB are using it or prefer the normal look of the game.