In all honesty it would be refreshing if people would simply be themselves!
In the end (we are who we are). Too many people knowingly put their "best foot" forward knowing full well that a year from now they aren't going to be nearly as nice as they are on the first date. People are fed up with "bait & switch" behavior designed to get someone to like a person or become "emotionally invested" only to have them later on say they are being "unrealistic" if they expect them to remain the way (they presented themselves) in the first place. It's not uncommon to hear someone say, "He or She is not the same person I fell in love with."
Be yourself and let the chips fall where they may. Ultimately we're all looking for someone who will love and appreciate us for who we are!