Don't know if this is a serious question or not but.....
You can use a contoller. If you like 360 controllers you can use that. If you like the dualshock then you can use that. Mouse/keyboard works better with RTS and mmo.
As far as multiplayer fps or tps games though if you dont use a keyboard mouse then you will lose. So just play those games on consoles if you prefer a controllers but for storyline 3rd party games they are better on PC because the graphics