I was a big fan of a lot of complex "realistic" simulations at one point... in theory. In reality--yes, there was the hours of boredom followed a minute of terror problem but there was also the problem that you're not going to hop into a reasonable facsimile of the cockpit of an F-16 or the command center of a WWII sub and control it without spending a lot more time training than all but the most very very serious simulation gamers are going to put in.