I'll admit to being an AMD fanboy but I had to go with an Intel CPU last year. I'm still rocking AMD desktop GPUs though, but past laptops I've had were Nvidia-GPU'ed because they are just far more ubiquitous.
Been pondering building gaming PCs for sale on eBay as a sort of hobby business, and I've concluded that ultimately it would be a better business decision to use Nvidia graphics cards. They are more recognizable to more casual gamers in both the PC and console world, more efficient, and Nvidia's drivers are better and more timely than AMD's as big new games release. Ultimately I got to consider customer satisfaction if I decide to dive into that kind of business, and right now AMD is a no-go. I hate Gameworks like anyone else though and I'm hoping for Polaris to be an amazing game changer for AMD.