"Hello. I'm very clean."

A personality is a sales pitch. I like that. I should, as I said it, and you can use it.

I have decided that when anyone asks me what it is I do for a living I'm just going to make up stuff on the spot. Polite society won't question a thing. We do put a little too much emphasis on things like that. What we should be worried about is if this person we just met is going to follow us home and steal the stereo, or fold over all the pages of the books in the library. We should be asking questions like, "Are you a good person?" or "Have you showered this morning?"
The handshake should take care of the "friendly" part. How often have you considered that when you shake someone's hand you are assuring them that you don't have any intent to hurt them? If you do intend to hurt them you shouldn't shake their hand, just so they know ahead of time. The smile is a tough one. If I smile at the cat he thinks I'm being aggressive by showing him my teeth. He's small but he never lets a challenge like that go by without some sort of rebuttal.
Eye contact is a tough one, too. Too little and you're about to get walked all over. Too much and you might have to fight to get out with your coat. Staring is just downright creepy. Try it and you'll see what I mean. Experimenting with these things will ensure that you have an interesting day.
I have a job interview today so I thought it might be fun to explore the arena of human body language. I'll let you know how I do.