For Sim Copter, my favorite was making a city in Sim City, then there was a way to place a military jet that would become a military chopper (usable missiles and all) in Sim Copter. I think either the first or last tile placed of this would become a military chopper.

I also remember practicing landing a helicopter if the fuel ever ran out (pitch forward, then pitch back at the right time to force the rotors to spin up and slow your descent just right to be able to land softly).

Then there was always driving around your own city and just destroying everything in Streets of Sim City.