I fly gliders from time to time (the eternal student pilot), and though it may sound odd, the AH D9 FM is extremely similar to flying a sport glider.
I know, it sounds "wrong", but it's my honest impression! The way it handles, the way roll rate picks up with speed, the way nose high turns kill your speed, the way nose low turns acelerate you etc. etc, it just feels the same as the glider I fly.
This isn't a bad thing! To me, the D9 perfectly recreates the limited experience of flight I've had.
Nothing else has come as close, certainly not the gliders in MSFS, although obviously the MSFS cockpit and proceedures are a lot closer, the AH FM "fits" my experience better.
And yes, gliders have drop tanks :-) (even if it's only water)