1) What yarn (that you don’t have/haven’t used) would make your stash “complete”?
Today I'd say that Lornas lace's colorway by Franklin Habit.. and some other day something else. I think I have tried so many different types of yarn, so propably the colors are nowadays that hits me.
2) What yarn do you never want to be without?**
Simply, protein based yarns. It can be wool, silk, mohair.. you name it, as long it's protein based, I'm happy.