Earlier quoted context omitted.
Ah, yes... the PC version should come with a giant red warning that says "DO NOT ATTEMPT TO PLAY THIS WITHOUT A CONTROLLER". There's still a learning curve even with a controller, but once past that the controls have a beautiful simplicity and responsiveness that I've seen in very few other games.
What's the point of playing a PC game with a controller? If I wanted to play a game with inferior controls, I would just use a console.
That is the beauty of combat in Dark Souls: it's not mindless button mashing, and it's not about precision aiming. It's about timing, reading your opponent, thinking ahead, and getting the right rhythm - it's more like dancing than combat, really. On top of that each weapon feels different to the point where you choose to use the weapon that feels right for you, rather than based on stats. It's a bit difficult to explain why, but that connection is a lot harder to achieve on keyboard+mouse.