I never expected to find myself saying this, but the time has finally come: I can actually recommend Windows 10. Not over OS X, mind you, but I’ve been a charter member of the “Windows sucks” club since day one.
However, I’ve been playing with W10, and honestly it’s not bad.
When it comes out in about two months, you can get a copy for free if you have a legit (& non-OEM) version of W7 or W8.
Based on everything I’ve seen so far, I’d say go for it.