That kind of preconceived notion isn't doing you any favors. I'll agree with you most of the time (DS was actually the first, and so far only game I played with a controller), but just like keyboard + mouse is inherently a better control scheme for FPS or RTS games, a controller is simply a better option for a game like Dark Souls.

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.

This is a really ignorant comment. First, it's downright silly to assume that KB+M is necessarily better for every game; even if the developers had invested time in improving the KB+M controls, the game would still operate far better with a gamepad. Second, it's also downright silly to think that there's no reason to ever use a gamepad with a PC. If you already have a gaming PC and you don't have a console, that's a pretty big reason to play it on PC. If you have a high resolution monitor that you want to take advantage of, that's a pretty big reason to play it on PC. If you're interested in modding, that's a pretty big reason to play it on PC.

Some games are built to be played with controllers. I've got a Steambox hooked up in my living room with a wireless XBox controller dongle, so I can fire it up in big picture mode and play controller-oriented games from the comfort of my couch, then go into my office and play an FPS on the same Steam account with kb+m. I also have a wired Xbox controller in my office if I don't feel like moving to the big screen. Both work equally well.

The "everything on one account" approach is really, really nice. All my save information is transparently synced across devices, and I can buy something from my computer (or even from my phone) and play it in my living room without any hassle.

In the case of Dark Souls, kb/m is by far the inferior control scheme.

First person shooter games work better with the precision of kb/mouse. First person melee games work better with the movement and directional actions of a controller.