In my opinion, if one is going to be clicking the "Desktop" tile every time they log onto the PC, there should really be an option to just start at the Desktop automatically. Ideally, I'd be able to have my start menu back in the corner instead of all my Start icons sprawling across a 27" monitor, but c'est la vie as the old folks say.
My secondary computer, that I use as an HTPC, has Classic Shell installed with Windows 8 RP. CS gives me an XP-style start menu and at boot it automatically switches to the classic desktop after several seconds of seeing the Metro screen (there seems to be about a 5+ second delay). I will be buying 8 for this machine, and I consider Classic Shell to be a "must have."