@tomie objectively, a bow. I tend to give handshakes if it's formal. I'll bow my head or give a small salute informally though.
@beardalaxy speaking of, another cool way was tipping of a hat but it naturally went away with hats
and I've heard that saluting without a hat on is frowned at least in some countries
@beardalaxy definitely anime
@tomie i can't find video of him doing it specifically lol but you're probably right xD
@tomie wait does kakashi do it