What's wrong with Mac keyboards? Sure no Windows key but I rarely use that on Windows. Other than that it's nearly identical.
There are some Windows 8 quirks but on the desktop it's going to be very familiar to Windows 7 users except for the boneheaded move of dumping the start menu. And I like the flat look better than the flashy Win7 Aero. Get a third party start menu replacement and the majority of complaints resolve themselves. Windows 8 is smaller than its predecessor, probably a first for Microsoft.
On the other hand, ALL of its apps are useless in the same way that all apps for smart phones are useless, but even more so. Plus even the free apps require you to be tracked by getting a microsoft account, with no side avenue to acquire them. All their built in apps, every single last one of them, are either broken in some way or no better than a web page, they're unintuitive, difficult to use, buggy, and spend more time presenting you with flash rather than substance. Ie, on a large wide screen monitor most of that area is wasted with very large fonts, unrelated images, and blank space, as if you were giving a PowerPoint presentation. The built in Metro apps all feel like summer intern projects, and not from CS student interns either.