I've read that starch can attract bugs: carpet beetles, moths, etc. If you do starch, make sure you wash it out of your quilts thoroughly. Sizing, since chemical, doesn't have this property.
I'm like Viquilt, I only use a spritz bottle of water. If badly wrinkled, I'll really wet the fabric thoroughly, then lightly ring out by hand, and finally press/iron it dry. Voila, no more wrinkles or creases. (This method works especially well on small pieces of fabric and things like handkerchiefs, linen napkins, etc.)
Anita