Obviously if you play with a controller for years and then try keyboard/mouse for the first time, you're going to find it awkward. I found playing FPSs on a controller awkward the first time I tried it, and in fact I still find it a little strange and foreign now.
I think the consensus is that, by nature of a mouse's function, it allows you to be more accurate... provided that you know how to use it properly.
I think the consensus is that, by nature of a mouse's function, it allows you to be more accurate... provided that you know how to use it properly.