Whatever you feel comfortable in! My philosophy is, the more comfortable you feel, the better the photos will come out! I want everyone to have fun during their shoot and you can't have quite as much fun if you're worrying that your skirt is too see through or your shirt too tight. Wear something that you've worn before and nothing too crazy that will date the photos. Try to stay away from being too matchy-matchy or anything that is too bright (neon) or shirts with thin stripes. You're more than welcome to change your clothes during the shoot. I think that one dressier outfit and then another that is more casual works best for shoots. Please check out my pinterest page for some outfit inspiration.