I'm really surprised the Tiger Moth didn't feature more strongly. Its a delight that rewards gopod airmanship. It teaches rudder control. The J3 cub is best for the pure joy of messing around on a nice day. The Single seat Pitts is the only aeroplane that has ever really felt like an extension of my body. Think it and it does it. Wonderfully benign in the air. Fearful on the ground. The Stearman is great. But its like flying an armchair. Smaller and more responsive is better. The aitourer (150 / 160 Hp) is a greatly under-rated aeroplane. Its the most fun to land. Loved the time I've spent in a Maule on floats, but you need to be somewhere like Florida where you can lake hop.
Worst? I find it hard to find any redeeming qualities in the Auster.