A recent employer issued me a new 15" MacBook Pro. I really liked the weight, battery life, screen quality, and the feel of the keyboard. But the non-PC keyboard layout drove me nuts. I.e., the absence of stand-alone keys like home, end, page-up, alt, etc.
If I was using only native Mac apps, I would have been okay enough. But I was accessing Linux GUI apps within a VM, and linux console apps via SSH. It was a real challenge to get decent Mac-to-PC key bindings. I also had real finger-memory issues as I'd switch between driving Mac and Linux programs from the same keyboard.
If I could get a laptop that's just like a MacBook Pro, except it had a PC keyboard layout and a 17" screen, I'd be all over it for my Linux work. But barring that, I'll choose a non-Apple laptop.