ebgames for some reason sent me a free copy of FFXI for the PC way back when I simply ordered FFX-2. I haven't played it yet but I think it'll be much better on the puter than the ps2 when I finally do get around to it.
I know for a fact that FFXI works nice with a keyboard, with some obvious advantages over the PS2. First of all, attacks are better executed via a keyboard (I tried using my Nyko AirFlo gamepad, which is identical to the button layout of a PS2 controller), so with the Nyko I had to select the target, bring up the menu, then selected "Attack." Using my keyboard, all that I had to do was select the target, and hit Ctrl+A which executed the "Attack" command. Also selecting a target, and hitting Ctrl+D executes a ranged attack, both cases demonstrate why a keyboard is far easier for attacking. Also, the PC verion boasts the obvious advantage of higher resolution graphics.