I've only been in Utah a week and so far my experience has depended heavily on impressions I've been making (due to interviewing, meeting new people, etc.). Thus, I have taken a more careful notice of the way other people have been impressing me.
Case one: A girl at church had curled her hair in typical Utah fashion and was dressed nice, etc. All credibility was lost as soon as she turned around to reveal one thick, straight piece of hair that had missed her curling iron. And here I thought your hair curled naturally in orderly little curls like that!
Case two: I was driving on the freeway behind a car who had his blinker on for 7.2 miles. (I know the exact mileage because of my trusty GPS*) He may have been a smart man, who knows, but I wouldn't hire him after flashing 7.2 miles of his own unrecognized carelessness.
Case three: I was driving past a group of elementary school kids today and while none of them had signs on their backs, it just reminded me of those horrid 'kick me,' 'I'm a loser' or 'I'm HIV positive' signs that kids paste to some poor child's shirt, and I realized: there's nothing worse/more humiliating than that. Not even being yelled and cursed at 37 times (caution OBSCENE amounts of swearing in this link) by a mega superstar during the production of Terminator...Christian Bale.
So when trying to make a good impression on a potential friend, job, or lover, my experience/recommendation is this: Before you check your make-up, mind, or heart, check your back. Because it's not what's on the outside or the inside, but what's behind you that really counts.
*There is no chance I will love any of my future children more than my GPS... Caveat: maybe when they're babies and toddlers, or adults, but definitely not during the 'awkward' phases.