I have a friend that has a C5 Corvette and usually when another Vette owner sees another, they wave, or give a nod in ode to their nice car.
While driving around town, I have felt the "urge" to give the nod to H2's and other Hummer owners. Out of three times, I got one that was, "F-You". The other two H2 owners gave a quick point (hey look, an H3!), nod, and a wave. Seems that we are a friendly little group here!
So, do any of you wave?