PC games are often played by PC gamers using controllers on their PC.
You know what's funny about this?
I still remember being disgusted when I was forced to switch to mouse/keyboard for my FPSs, since they stopped supporting joystick control. Why should I, as a PC GAMER be forced to use mouse and keyboard like a common office worker, or a Mac user?
This illusion that mouse and keyboard somehow defines what it means to be a PC gamer is laughable. Now I'm playing DA:I with a controller, and at no point do I feel like a console gamer. Except right now, since we're all using X360-graphics 