If you don't want use Metro however briefly, don't install Win 8.
I argue that Metro goes to the desktop so quickly it's like you opened the first door and if you closed your eyes for 2 seconds, you are past the second door and in the room you wanted. I grew up in an apartment like that. We called that room the reception hall.
To be sure, Microsoft is taking a big gamble with this front end interface and maybe we are being forced to use it
as consumers if we plan to buy a new computer in the next 12-18 months but that is not the case with the
enterprise as our support for Win 7 will take us more than seven years down the road.
I am hoping that Microsoft has a winner in the consumer market. Who knows, if enough consumers buy into the new interface, they may ask for it at work.
Or is that your fear?

Personally, I am ready for a new way to interact with my computer.