@ryanc Prior to XP and Luna, the late Whistler betas had a theme called Watercolor that was honestly just gorgeous. It's disappearance is the most egregious thing.
This is what they took from us. I mean look at it. It's so clean and tasteful, with just the right amount of playful and whimsy. An ideal evolution from Windows 2000. Also came in green IIRC, but I may be conflating with the fan remake that came out years later.