The ultimate objective when listening to or reading the Bible can encompass several of the options you've listed, but it is most fundamentally about growing in spiritual maturity. This includes developing a deeper relationship with God, understanding His will, and allowing His teachings to transform our lives.
While expressing worship, exercising discernment, and acquiring knowledge of theological truth are important aspects of engaging with scripture, they serve the broader goal of spiritual growth. Ultimately, the Bible is meant to guide us in living out our faith, increasing our wisdom, and shaping our character to reflect the teachings and person of Jesus Christ. Therefore, while all the options contribute to our experience with the Bible, growing in spiritual maturity is the overarching objective.