I’m with Elwood, I pretty much wave to anything on two wheels, other than bicycles, and that’s because around here they think they don’t have to obey the rules of the road, they run red-lights and crap, and I don’t do that on my bicycle, so it makes me mad, lol. I just drop a hand. Some cruiser’s either don’t see me, or are stuck up, ’cause sometimes I don’t get a wave from them. Most everyone waves, trikes always wave (my neighbor has one, so maybe I’m in the circle or something). Here, even if there is a barrier on a divided highway, people make sure to lift an arm instead of dropping it. I’m 2 hours west of Seattle, small bike community. I don’t ride with the local club, because they’re mostly harley, and most of them have the attitude if you don’t ride a harley then you’re not anything. The first time I waved, I was scared to take my hand off the handlebar, so it was like this two finger thing like an inch from the bar……they probably laughed at me. Then the same day, another guy did this two arm wave, it looked like ocean swells, that’s the only way I can describe it. I about died laughing at him.