The Harrier has been great for my formation flying skills, since it doesn’t hold your hand at all for air-to-air refueling, and you can’t see the probe when flying. (It’s directly to the left of your head.)
My flight sim time last night was the combat sim equivalent of a mug of hot chocolate: a short takeoff from USS Tarawa, refueling from an S-3, then a 220-nm cross-country flight to Tbilisi-Vaziani to get used to TACAN navigation followed by a vertical landing on the runway.
The Harrier is a ton of fun to fly, even if it isn’t as readily supersonic as the Viggen. Very nice nav/attack systems, and (probably because I’ve flown F-16s so much in Falcon 4) a nice, familiar, American HOTAS/MFD/HUD setup.