What's the Purpose of Mitzvos?

When we learn and when we do what is right according to the Torah, we should remember that the chief purpose of all these things is to make different personalities out of ourselves. That’s why it’s very, very important to have in mind always that the "garment" of all the mitzvos is the midos ​(character traits). The midos with which we do the mitzvos is going to be the chief criterion of our success. — Perfection in Marriage