Me neither. Especially now that I managed to adapt the start screen to my needs (first column: the only ModernUI apps I need like Desktop, Mail, Weather and a few more. Second column: Office 2010 apps and various tools. Third column: multimedia. Fourth column: games).
Having the desktop background showing in the start screen nailed it for me: now when I press the Start button the only thing I see is all of my apps at a fingerti...err, at a mouse click, and it also has the plus of looking like a nice overlay menu for the desktop underneath (I know it's not like that but still, it looks like it is).
What I really would like to have from ModernUI is more customization options for tiles: not being bound to the two smallest tile format factors for desktop apps, being able to change background color manually (and, in that case, also text colour if there is any) or things like those.