How much can you get to know about someone just from a handshake?

so much, you'll even find out their deepest and darkest secrets

Quite a bit I'd say. Like, I shook someone's hand yesterday and i sorta already knew he was a bit............. Y'know... Woowoo, I DON'T MEAN THAT IN A BAD WAY!! HE'S A SWEET FRIENDLY GUY!! But, if I didn't know anything about him as soon as I shook it, that............ Uh... "thought" would come to mind. ┬┴┬┴┤•ᴥ•ʔ

sometimes a lot! A good firm handshake tells me.. you are friendly and a strong soul. If you give me a wimpy..hardly touching my hand.. well, I guess you are scared of germs or .. ;-)

A correct handshake is essential in identifying those who belong to the same fraternal order and may even designate the position held in that order.

Nothing