I am a huge proponent of PC gaming, but I will be the first to admit that the Consoles do some genres better, PC does others better. If it's a 3rd person adventure game, I want it on my PS3. Assassin's Creed, Uncharted, God of War... I would never want to play them on my PC. I could get along with my gamepad, but I'd prefer the PS3. Any FPS, though, and It's PC all the way. In an FPS, the ability to press two separate keys to strafe adds a layer of control that a single analog can't bring, and the mouse control if an obvious benefit.
And when it comes to a strategy game, the mouse offers so much more freedom to utilize UI elements than a controller. With a controller, you can only go left, up, right, or down, or map something to the limited scheme (Which is a convoluted process after a certain amount of options), so games with many options and screens don't work as well. There are multiple non-genre bonuses to a keyboard. You can multitask much easier and use all 5 fingers instead of wasting 2-3 holding something (Such as holding a talk button, Strafing, Firing, and jumping which I do in TF2 regularly), since theres many options you generally have the options to customize it how you like
Alot of the reason I love PC gaming, though, has very little to actually do with hardware, it's about expectations. I can't tell you how many times I've raged at the console standard of 30 useless seconds between matches online where you do NOTHING. Local hosting MP is a pale shadow of the Dedicated server experience. Open mics as a standard and, even worse, usually located in the busiest room in the house instead of a den or personal room is an atrocity.
Anyway, the short version is: Fighting games suck with a keyboard, anyone who says otherwise is provably wrong.
Edit: I really think the hand ache thing is just a case of using muscles you aren't as used to. Like I said, Keyboards really engage all 5 fingers, Gamepads use your thumb and about 2 fingers. My left pinky is now an iron warrior of great Ctrl pushing power, but it wasn't always that way. And since it's more of a work out I do have uncomfortable hands at times, I go out and play my PS3 to give them a rest.
DOUBLE EDIT!: I wanted to point out that I played Final Fantasy 11 for a very, very short while, and the default control scheme was a keyboard only, no mouse layout. Arrow keys to move... Numpad to control the camera... It was one of the worst experiences of my life. So, I can attest that keyboard alone is a horrible, horrible control method.
And when it comes to a strategy game, the mouse offers so much more freedom to utilize UI elements than a controller. With a controller, you can only go left, up, right, or down, or map something to the limited scheme (Which is a convoluted process after a certain amount of options), so games with many options and screens don't work as well. There are multiple non-genre bonuses to a keyboard. You can multitask much easier and use all 5 fingers instead of wasting 2-3 holding something (Such as holding a talk button, Strafing, Firing, and jumping which I do in TF2 regularly), since theres many options you generally have the options to customize it how you like
Alot of the reason I love PC gaming, though, has very little to actually do with hardware, it's about expectations. I can't tell you how many times I've raged at the console standard of 30 useless seconds between matches online where you do NOTHING. Local hosting MP is a pale shadow of the Dedicated server experience. Open mics as a standard and, even worse, usually located in the busiest room in the house instead of a den or personal room is an atrocity.
Anyway, the short version is: Fighting games suck with a keyboard, anyone who says otherwise is provably wrong.
Edit: I really think the hand ache thing is just a case of using muscles you aren't as used to. Like I said, Keyboards really engage all 5 fingers, Gamepads use your thumb and about 2 fingers. My left pinky is now an iron warrior of great Ctrl pushing power, but it wasn't always that way. And since it's more of a work out I do have uncomfortable hands at times, I go out and play my PS3 to give them a rest.
DOUBLE EDIT!: I wanted to point out that I played Final Fantasy 11 for a very, very short while, and the default control scheme was a keyboard only, no mouse layout. Arrow keys to move... Numpad to control the camera... It was one of the worst experiences of my life. So, I can attest that keyboard alone is a horrible, horrible control method.