Spoilers

I always loved the scene right before Commodus kills his father going over the list his father gave him. I always feel so bad for him "You wrote to me once, listing the four chief virtues. Wisdom, Justice, Fortitude and Temperance. As I read the list I knew I had none of them. But I have other virtues, father. Ambition, that can be a virtue when it drives us to excel. Resourcefulness. Courage. Perhaps not on the battlefield but there are many forms of courage. Devotion, to my family, to you. But none of my virtues were on your list. Even then, it was as if you didn't want me for your son."

Or the final sword fight between Commodus and Maximus (sword, sword, give me a sword!)

End of Spoilers