Game pads put more strain on your hands causing unnatural movements that can quickly lead to arthritis and other injuries.
Playing with mouse and keyboard is better for your hands, wrists and fingers in every way but there is a wrong way too which can cause issues although not as serious or prolonged as the game pad.
Keeping that in mind I'd rather use mouse/keyboard so I can game for many more years. All these console FPS games that have aim assist reveals one thing, that they are obviously more difficult to use in such games and less precise as a result. If anything all the consoles should support mouse and keyboard... I'd be inclined to say sales would go up if they did.
In the past a friend of mine and I tested this out and he is very good with the game pad as this is all he uses for his xbox and playstation. We played against each other on the PC and he used a game pad with aim assist and the mouse and keyboard performed as a superior controller... granted I use one of these, it is still a keyboard: Cyber Snipa CSGPBK01R JOYSTICK - Newegg.com
and my mouse: Cyber Snipa CSLMSL01 Black Mouse - Newegg.com
It takes less of and more natural movements for the M&K so your brain can actually relay the information quicker and it is less information instruction-wise.
.... and reading what I just wrote, I sound like a damn nerd HAHAHAHA!
