I always wave at any Hummer. There are about 4 H2's (incl. mine) 2 H3's and 2 H1's around here. So far I've only gotten a wave back from a guy in a black H2 that I see often and 1 H3. Never from an H1. I'm hoping it catches on more also. In our old Jeep, you always got a wave back and pretty much the same in our F350. I love it when people wave back, it gives me the warm-fuzzies

I'll keep on trying till they all do it back if for no other reason that to make me stop!
