Sadly your argument is one that has been posted many many times in forums all over the internet.
In the end it's kinda silly to call consoles consoles since they are technically just PC's with the sae hardware and OS's. But that's besides the point, as long as their are consoles and PC's their will be groups who believe their way of gaming is superior to the others.
Now personally, I have to say in my opinion, First Person Shooters, and Real Time Strategy games tend to play better on PC, the mouse allows me to have more freedom in how I aim and the keyboard some more customizable and relaxing ways to move and perform actions other than aiming, looking down the sights, firing and in some games, melee and switching weapons and throwing grenades which I slap on the mouse, Logitech G5 is awesome. I tend to see alot of racing games that work great with a controller, as well as alot of 3rd person games like the GTA series.
Now again it all goes down to the controls and how they work for people some people, the mouse and keyboard work fine, and if there was a way to hook them up to a 360 they'd probably waste everyone with ease, and then there's the other way around, PC games that don't have 360 controller support that if there was some a 360 player would waste PC players. Personally I feel PC controls of mouse and keyboard allow a little more freedom and aren't as cramped as the controller since with mouse and keyboard your hands aren't both smashed and held to one single thing though a controller is nice in how compact it is and how, with the 360 controller at least, it's fairly ergonomic, Playstation controller hasn't changed much. Also I know it's kinda like a whoopty do but the amount of peripherals for gaming for the PC, wheels, joysticks, etc, are almost disgusting but it's awesome, if only they could have some more for XBbox or PS, or a way to use PC peripherals on the consoles.
One thing I do think PC has over 360 though is that you don't have to pay a fee to play the games you own online, I mean sure, it's only 50 bucks but it's still rather cheap of Microsoft don't you think? PC games also have quite a bit more support than console games or at least the PC versions of a game do, if there's a bug or issue in the PC version the team gets up and throws a patch out to fix it, but if there's one on the console version the team tends to be a little reluctant since to update a game for 360, it's almost damn near impossible to get a free one out, since Microsoft set out a nice little rule if a patch or addon is above a certain filesize, the players will be charged for it. I'm not 100% how it works on PS3 but I know it took them a while to fix a rather large bug with Call of Duty 4 and I'm not sure if the patch was free or not.
Now the war between Sony Fanboys and 360 fanboys and the PC Fanboys will rage on and on as long as there is an XBox and a Playstation and PC's, they all have their high points, PC ruled and had a long one getting gaming kicked off, then the XBox had it's trip which is still going and quite strongly with the PC putting along behind it at a steady pace and the Playstation which had a nice good boost out of the gate kept it up nicely as well admittedly ahead of the PC hit a small bump on the road at the PS3 but with some new bits and a nice drop in price is pushing ahead again. They will always be in a race so long as they exist, sadly Nintendo fell face first in a pothole with the Wii and is just sitting there while blinking it's eyes with mud covering it's face staring bluntly at the other three as they tear ahead. They'll all have their shining moments in 1st place and will all have their shining moments in last and their struggling moments in 2nd and 3rd. But I don't see how any of them are superior to any of the others, well except the Wii, I mean, really Nintendo?