Done most parts of the world in both wokkas and heavy jets...both have pros and cons. I really enjoyed flying the Chipmunk, pure stick and rudder stuff as was the Tiger Moth. I loved the Huey for just the same reasons; maybe we should continue to teach elementary studes on stick 'n rudder stuff, then allow AFT to introduce the glass cockpit and HUD stuff?
From a rotary point of view, I really enjoyed beefing on the Squirrel. Easy to teach on as it was straight forward to fly and it's vices are few and far between.