I ride this monster

and I wave to EVERYONE. People on metric bikes, people on american bikes, people on scooters....heck, I'll even wave to bicyclists sometimes. I figure if you're out on two wheels then good on ya.

I have found, though, that many Harley owners don't wave back. Maybe they think they're too good for me, or maybe they bought the bike to prove something and they really aren't riders so they are terrified to let go of the handle bars long enough to give a quick wave back.