Around here, everyone waves to each other.... small coastal though.
When we still had the bikes on the Sunshine Coast, the ol girl got plenty of waves, but long blonde hair on a Trumpy or later on, the Harley, will always get that.
When I rode the big black Jap cruiser I had, not many waves, none at all from Harley owners.
However, when I rode the custom chopper, nearly all the Harley riders wanted to wave or ride beside ya, thumbs up etc.
Oh, except one guy who wanted to street race me.... He drilled me getting away from the lights, but I hauled past him by 200 metres and just flogged him.
At the next set of lights, he wouldn't even look at me, much less wave to me.