I'll never forget the first day I was riding and someone waved to me, I felt like I was part of the club, so now I wave at everyone, you never know that person may be on their very first ride. I have theory about why people don't wave. Harley guys don't wave because they are too afraid to take their hands off the bars just in case the bike shakes itself apart or if they do the whole drop the fingers low and to the side, they aren't really waving they are just catching parts that are falling off. BMW guys don't wave because they are desperatly clutching the latest recall notice. Goldwing guys don't wave because they are busy making coffee or programing the CD/GPS/Cell Phone/Sat Nav computer. Adventure guys don't wave because that is the job of the support van that is following them on their long way around. As for me, I wave at everyone on two wheels but I've got admit I really like the whole idea of standing up on the pegs, locking the throttle and waving with both arms. I might have to start trying that.