I only style my hair with conditioner and cream. I leave in Aveda Sap Moss conditioning detangler cause even though it's not meant as a leave-in, it's light and leaves your hair shiny. Then I use either Aveda be Curly styling cream or Curls Rock cream as my only styler. If I am wearing my hair in a ponytail, then I skip the styler altogether.
I think regular conditioner as a leave-in is a thick 3c's best friend. The key is finding the right one.