A plane. A cheap, 2-4 seat prop plane. A full sim rig can fly ANY PLANE and spaceships too!
I am not in any way a sim gamer of any of these sorts. My inputs are keyboard, mouse, or controller. And I suck at everything I play, and I try to limit my gaming time (and expenditures on gaming).
I would love to work on a project to build a thing that could reconfigure itself to match any existing cockpit. That would be sick. Maybe like a bunch of self-arranging robot building blocks and each has a different kind of switch or dial. Or each one can simulate it, hopefully in 3D with force feedback. They crawl into position and lock arms to form the cockpit. Send a command and the F-16 rearranges itself into an airbus 380. Or a corvette.
A real plane would be most definitely satisfying in its own way, but Sim planes let you perform crazy maneuvers, fly places you wouldn't be allowed to in real life, and fly aircraft that you would never even get a chance to see. Not to mention, the whole threat of death with real life flying.
Really good points that you bring up. I can agree with you fully now. Especially on the point of being able to do crazy tricks at no threat to your own real safety.