What is it? Do you prefer wind powered, motorized, or both?
I don't have any motorized motion stuff (i.e. Vortex Rotary, Snow Flocker, etc) and still rely on the simple wind powered stuff. (i.e. Silo-sock Flyers, Ultra-light Reel Wings, Reel Wings 360s).
Granted I'm at a disadvantage on windless days, but the trade-off is the cost, maintenance, and weight of the power equipment.