I use realistic a lot because of my crappy SDTV. (can't see anything on Sim) I never use the lock-on button (although the game auto locks on whoever you shoot at

) Even when it's locked on I don't use the auto look at target button and I try to ignore the arrows. If I ever get an HDTV, then Sim mode, here I come! I wish there was a Sim mode variant now that was completely the same except for icons over planes.........