Works for me
Purely a practical choice for me.
I've got a late 2013 15" Macbook Pro I purchased from Apple's Refurbished store. Got last years model and saved my company £340. At that point it was cheaper than the equivalent Windows PC.
It spend 90% of it's time booted in Windows 7 with occasional forays into OSX. I'm a software developer working on a mixture of Windows and Linux systems with some multimedia work & app development mixed in. It has its quirks, but so far has been the best laptop I've owned, mainly down to the screen resolution.