I use an online app called FSE (Flight Sim Economy) to make my flight sims into an RPG or virtual pilot career of sorts. Been flying with FSE for over ten years now in both FSX and P3D, and next week with the new MFS.
Buy a plane and fly jobs from airport to airport while paying for gas, maintentance, and repairs. Just a little GA pilot trying to make a living and keep my plane flying! Much like a flying version of Euro Truck, which is probably why I enjoy it so much!
that's actually pretty cool, the main downside of these kind of sims to me it was always the lack of some kind of more "structured" gameplay, some sense of purpose. Mixing up FS2020 with "truck sim" gameplay is rather cool. "Microsoft Flight!" has this mind of gameplay career/mission mode, but it sucked bad as a flight sim. Still I remember fondly flying around Hawaii in my Icon A5 (that's why it will precisely be the very first plane I'll try on FS2020).
However, I'm not really in for the long haul airliner flights. Longest flights I would probably make would be something like between islands in the same archipelago. I'm more of a small plane, short tourism flights, "point A to point A" virtual pilot
(but using small planes instead of helis).