Well my VERY first sim was Flight Sim (way way before MS bought it)
which I played on a Sinclair Z80 with the 16K memory piggyback, loaded (taking about 15 minutes) via tape player and viewed on my 12 inch b/w tv. Have I sufficiently dated myself here?
For Naval sims it was Red Storm rising on C64, SSII, AOD (which I maintain 12 years later STILL has things to teach modern devs about sub simming!!), fooled around with 688i some, went totally back to flight sims until last fall when I got SH3, which I find with patch and mods to be a very nice game, faults not withstanding.