It's not bad to play on PC, it's just that "PC gamers" have always had this high and mighty attitude when it comes to consoles that makes no sense at all really.
It used to be years ago that PC games dominted with FPS games in terms of controls and graphics, but since the ps2/XBOX/gamecube generation they don't anymore(largely thanks to the halo series). Consoles today are pretty much computers and have outstanding looks and more importantly the game library is larger and more diverse and the games play much better on consoles. The only genre the PC still holds and probably always will are RTS(real time strategy) like starcraft, you'll just never be able to play one of those as efficiantlly with a controller as you can with a mouse and keyboard.
I hardly ever game on the PC and if anyone wants to go ahead, but they're the ones that have talked smacked for years and it's just outright ridiculous at this point. There just isn't a single good reason if you're a gamer to perfer a PC to a console, specifically the XBOX 360