Jesus Phish said:
You can play the entire game of World of Warcraft with a basic two button/scroll wheel mouse. I wouldnt recommend to do it that way, but you can.
Even seen the video of a guy playing a frost mage with a plugin steering wheel? lulz, only doable with certain classes and your playstyle is insanely limited.
Also, games that require a lot of small movements, such as WoW, require a large array of buttons, keybinds, macros and modifier buttons if you wish to excel at PvP(I have a friend with around 70 different buttons used for PvP) or raiding, you just can't do
that kind of MMO with a controller, it's just not realistic.
And the only reason FF11 was on the 360 was because you could plug in a mouse and keyboard I believe, but I'm not 100% sure on that.