This is one of the first things I noticed here, and I really liked it: after shaking hands, people touch their hearts as a sign of respect or friendship.
They use the left hand to greet other people and, depending on the region, they can touch their heart, mouth or forehead.
What on the contrary I found a little weird for a second, was the fact that between girls you don´t just kiss the two cheeks, but you kiss the same one twice, or more. You don´t understand why it´s weird? Try!