First impressions are important and I try to dress professionally, but will definitely ease it down once I've established a relationship.
It's hot here in New Mexico and I've made it a habit to wear sandals along with dress clothes (lol). I've always been back and forth on the dress up or layed back look. Funny enough, last month, the father of a client of mine went out of his way to mention how he noticed I wear sandals when we go out and view homes. I thought I was busted but oddly enough he said this shows him that I'm comfortable and confident enough to wear what I want which made him appreciate and trust me even more... Hey, who knew!