Question Keyboard & Mouse or Controller?

[Al]

What's your go to when playing FPS games? I get that if you're a consoles gamer you're mainly restricted to a joypad, but for us PC gamers do you opt for the convenience of a controller or the fine-grain control from keyboard & mouse?

I've always found that trying to get a controller to work on my PC is hit and miss, so I tend to just stick with K&M. Have you ever managed to get a controller to work on PC? Was it worth it?