Most immersive sim:

Janes F/A-18

Flying a night strike (in a dark room ) against a modern integrated air defense network; sorting my radio communications from the comms of a dozen other flights; working with the strike package; dealing with information overload; delivering the ordinance and nursing your ship home as cascading damage causes systems to fail on the long way home.

Then a successful night trap.
I needed a cigarette and a drink at the end of some of those missions.