I said that once apon a time too, the games is fun I'm a big fan of FPS and the frill of killing AI is amazing but there's a limit, i realised this after having completed the main story and getting to like 28.. Then I was put in a situation where I was hearing the same thing, you know it's not so much the doing the same thing I'm happy running around exploring and killing everything but being forced in to a room to shoot a single enemy for 10 mins can really wear you out.