What are the types of lectures we need to hear in a week so that we will joyfully stay in KC?

From: upendra baliga
hare krishna, we hear that “hearing” is the most important aspect of spiritual life, and by the mercy of prabhupada ISKCON has grown so lange and wide, there are so many lectures to hear, but my question is what are the type of lectures we need to hear in a week so that we will joyfully stay in kc , without compromising in any aspect of kc