Impressing
No one likes you for your clothes, your car, your possessions, your title, or your accomplishments. Those are all "things." People may like your things--but that doesn't mean they like you.
Sure, superficially they might seem to, but superficial is also insubstantial, and a relationship that is not based on substance is not a real relationship.
Genuine relationships make you happier, and you'll only form genuine relationships when you stop trying to impress and start trying to just be yourself.
Impressing should be a side effect of being exceptional at something. The above paragraph describes, "caring what people think about your appearance". I'm not sure it has all that much to do with impressing.