Of course that's a matter of taste but Luna interface/theme made whole XP being more appealing to ordinary people - especially with these task-oriented elements. On the other hand, "classic" widgets had that strong bare-bone technical and functional look that made whole system scarier to some degree.

I had tons of "Visual Styles" back then and in the last XP days I opted for grayish Royal or Royale. It's such shame that MS has abandoned Watercolor theme - that was a middle ground: interface was updated and yet, still similar to classic design. And it was even in some elements flat before that style become a dominant. Luckily we're slowly moving away from that and I won't be missing it.