When you find yourself meeting a lot of people in quick succesion, like when you are on holiday when you might have brief and superficial contact with a range of people, you inevitably find yourself makng ad hoc decisions about whether you like the people or not. I find myself liking the people who are not doing any selling of themselves. When you are younger you are more inclined to sell yourself, you are more competitive, feel the need to impress. Hopefully you grow out of this. It is nice to speak to someone who remains inscrutable and, in general, these are the people I like. And yet, just being inscrutable is not enough. It is nice for people to be quirky, surprising, for them to take risks and try and make a contact. My advice, though, (if you are desperate to impress me) is to avoid talking about jobs. Recommended is to be able to be entertaining and warm but give nothing away. In other words, offer a vessel, but make sure it is an empty one.