inquiring meerkat inquires

I freely admit to judging people (especially men) by a) if they own their shit, and b) if they can be amused by their shit, especially if they do it in a graceful fashion (ex: RDJr vs Charlie Sheen). When I hold to that standard, I find I am rarely disappointed in a person.

What sort of 'tells' do you have, when observing someone new? How accurate is it?