A lot of familiar stuff in the thread.
C64 - F15, F19 Stealth Fighter, Airborne Ranger, Pirates, Silent Service, Red Storm Rising, Elite
Amiga - F18, Silent Service 2, many others
Early PC XT/286 - M1 Tank Platoon, F19 Stealth Fighter 2.0, Battle of Britain, Secret Weapons of the Luft, Falcon AT, Wing Commander, Red Baron, and mostly Quake 2
486- Falcon 3.0, X wing series, further Wing Commander, so many others like Janes various sims like ATF, Navy Fighters, 688i, Aces over the Pacific etc
P2 200 to 450 era - Rainbow 6 numero uno, Falcon 4.0, Warbirds
I would say that overall the best titles came from Microprose back in the day, and Janes. It's been a long ride with Aces High now too, hopefully some of that magic returns with the new version, from the first beta and very first version that was 29.95$ per month, otherwise known as 60 bucks Canadian back then, and well worth it.