When I have the privelidge of driving one of our fine Jeep specimens, I love the wave (I miss it when I'm in the Xterra). I swear I want to flip a U and bslap the non-wavers so badly. Or maybe we could make a rule where we were lawfully able to, like a citizen's arrests w/ drunk drivers, just take their Jeep keys away from them.
Okay, anyway, I'm an out-the-door waver for sure. If it's a stocker that I know is clueless, I might restrain myself until the last minute, but I always at least steering wheel wave in hopes that they might learn the way.
But the out the door is the best. The arm swing, wrist action, 3 or more finger splay.
Once I even got a salute wave which was pretty cool.
I also try to get the wave up first on a larger more modified Jeeper.