|It's like bringing a plate, but you're the plate|
You don't have to be all of those things, but if you can cultivate one or two, it can improve your friendship prospects. It's not about pretending to be someone you're not, it's about making a point of showing off your best attributes, just like you'd talk up your skills on your resume.
Where it differs from a job interview, though, is that it's generally not helpful to tell prospective friends that you're honest or funny or interested in their hangnail. These things are demonstrated rather than told, so in most casual social situations verbalising it will probably make you look a bit weird. Rather, jut wait for an opportunity to show that you're honest, you're witty, or you're willing to lend a hand. Friendships are an investment of time and emotion, and every time you show you're suitability as a friend, you're showing that you're worth that investment.
(In case you'd like it, here is some research into what people consider important characteristics in their friends.)