[Ringo5tarr]

So I asked somebody this before (I don't remember where or who) but I don't remember getting an answer that really helped, so is it better to have an air of professionalism or relaxed confidence? Like, should I be as well dressed and groomed as possible while trying to use complete and proper grammar or should I dress and act like I typically would at competition, that is, clothes that I feel conformable in, speaking in my typical (not really professional) manner?