Well, if I knew the person was Androgyne (it's not like we wear signs), I might glomp them...so watch out!

(for those of you not in the 'know', a 'glomp' is something of a flying tackle...heh)
Usually when I meet someone, I just say "hi". If they offer a hand, I shake it, if they hug me, I hug back...I just go with the flow.