I bought my first Windows 8 machine in January, not by choice. The new app system confused me to death, and still does. I had no idea what the name for it was until your post. I will be forever grateful to you for providing the name "metro app" so that I can google what in the world this is and learn what I can do about it.
I tolerate Windows 8 about as well as its two predecessors. The first thing I do on a new Windows machine is install Firefox and Cygwin, and since I spend most of my time in those two environments I usually don't care very much what OS I am on. With Windows 8 the one exception has been the new metro-ized Windows Media Player, which I had to promptly replace with VLC player.
The printed documentation that came with my Windows 8 box was useless about all this new stuff. It seemed to think the first thing I would want to know was how to find something called "Windows charms." Frankly that sounded awfully girly to me so I wasn't much interested, but they seemed so proud of it I went to check it out. I wasn't much impressed, and I'm not sure why they thought that should be question #1 on the cards they printed and stuffed in the box.
Many thanks for just those two words!