I have very good genetics for vascularity. I always have veins in my arms, calves, and when i skip a few meals i get them in my quads, calves more then usual and the small ones all over my bi's, chest, etc.
mine come in my calves first and then the peronous & extensor digitorum longus (muscles on the shin). then the quads start coming in. this all happens around 10% for me.