I needed to update the hardware one of my video editing workstations to do 2k, 3k, & 4k renders in a reasonable amount of time. Built an i7 and decided to try Win8 because it was pretty cheap. (cheaper than the last OEM copy of XP I bought years ago) The machine has Vegas Pro 12, VLC, GOMplayer, Mplayer, and Gspot installed. That's pretty much it. I spent a few days trying to keep from driving over to Balmer's house and ripping his dick off for creating such a piece of shit interface, but with the help of the mighty Googles, I eventually figured out how to do REAL network sharing, turn off the bulk of the childish bullshit, and change all the settings to create something that resembled a functional work machine.
My workstations run for months at a time without restarts and the only time I see the Metro interface is on a rare reboot. The half dozen applications I use all got a desktop shortcut the way jebus intended. That's how I start them. Since I have a pair of 32" monitors on this box, bringing up the metro screen is like getting hit in the face with a sheet of plywood. Fortunately, I rarely need to access it.
My only real complaint so far is that the OS locked up tight a bunch of times when I was trying to mass copy about 100k files at once over the network (2 TB or thereabouts). No blue screen, no complaints or warnings. Complete pull-the-plug-to-restart style lock-up like I haven't seen since the 90s. I don't know if it was Win8 or a flakey chipset driver (Asus Z77 board) but I had to end up hand-copying top-level directories one at a time to finish the job. Robocopy blasted the whole drive to an outboard backup drive without any issues later that day, so I'm going to assume that whoever wrote the GUI file copy stuff is a graphics designer and completely unqualified to do real coding.
Outside of that, I've pretty much gotten used to the OS. The new highly-informational file transfer and Task Manager dialogs are completely worth the price of admission. (GUI copy is borked, but it looks nice) I completely ignore Metro and I never used the Start menu on 95 thru XP (desktop shortcuts all the way, bitches!) so its absence doesn't bother me in the slightest.
Not having a shutdown button on the taskbar is massive FAIL though. That really pisses me off. I still might drive over to Balmer's and set fire to his lawn gnomes or something.