Just an observation and comment when it comes to the 'wave'. Personally, I try to wave at everyone. I stick my hand out, if I can, I'll do a sideways peace sign (or victory).
I've read so much on this topic. Has there been a poll? Maybe if there was one, and one wave received many more votes than others, why not just use that?
With that in mind, if someone conducts a poll, please don't include stupid hard to do waves, like taking your boots and socks off, and holding up your pinky toe (Seinfeld ).