Chief among my advise to people about what to plant is plant what you like, so you will use it.
So I set about to make a tincture from my mint. Into a large pot I put some water and a steam basket, upon which was a cup. On the basket but not in the cup were the mint leaves. The lid of the pot was inverted to direct condensation to the middle where it would drip into the cup.
After a bit, some clear liquid had accumulated in the cup, and the water in the pot had turned to tea. The clear was certainly not plain water but it wasn't minty at all. The tea however was ok, but again, not terribly minty