This recording discusses the need to do Teshuva for character flaws, and why character refinement is an integral part of Serving Hashem, even if not explicitly one of the 613 Mitzvot.
Topics include:
Repentance For Negative Character Traits
Spiritually Corrosive Triats, But Not Specifically Prohibited
Anger, Hatred, Envy, Frivolity, Pursuit of Wealth, honour and Food
The challenge of this type of teshuva