I may be in the minority but I actually prefer the xbox 360 controller for everything (including fighting games). The circular nature of the 360 d-pad is actually more appropriate for pulling off certain moves in fighting games.
Also the 360 d-pad has actually been fixed. I'm not talking about the more expensive new controllers I'm talking about any standard xbox controller made after 2009. There was an issue with responsiveness thats pretty much been resolved. I used to think it was just a bad design but there is nothing really wrong with the circular design it was just a wierd issue that old controllers had. My current controller responds perfectly. When I press right it goes right, etc.