Billy,
Just be yourself. If you try to be something that you're not, that will show and you may end up in a house that is not right for you.
Don't worry about the way you look.
Personally, I love the hit man look.
Just relax and look for the group of guys you could call friends-- they are the ones that will appreciate your nice guy qualities.
being a nice guy is a GOOD thing. Do not change.
Amy