Seeing lions is amazing. Having them getting close (within inches) is thrilling. Hearing them growl at night is an otherworldly experience.
Other predators and prey are as fascinating, and when you have a guide that goes above and beyond for giving you unique experiences, you are treated with the most amazing sights of raw and rough wildlife.
Other animals are also wandering around, and observing their curiosity and general behavior is fascinating and at times hilarious.