Super vs. Human, not Good vs. Evil

We talked a lot in class about how there was a battle between the evil Mr. Hyde and the good (or, not as evil in most people's opinions) Dr. Jekyll. However, I really think that Mr. Hyde is a representation of power, strength, and super-human ability, not evil, and thus Dr. Jekyll is a representation of humanity. In "The Replacement" we see this battle come over both Anya and Riley, and they continue their struggles between super-human abilities and humanity throughout the seasons.
A lot of people in class were quick to blame Jekyll and condemn him as selfish and evil for what he unleashed unto the world, but no one really criticized Anya or Riley, because we are told that they are "good" guys through their association with the Scooby Gang. Riley, as we see later with the vampire feeding house, is conflicted. He wants to return to his army days, where he was under the control of others, but he was strong and a good fighter, and was an equal match to Buffy the Super Hero. He doesn't want to face his humanity, his weaknesses, and the fact that his is mortal. Anya is the same way. She was once an all powerful vengeance demon, who killed and maimed men for sport, and when she has to face her mortality both in "Dopplegangland" and "The Replacement" she is scared and wishes that she did not have to suffer the way weak mortals do. The both, but especially Riley, envy Buffy and the way that she can be both the valley girl and the slayer, or can go back and forth when she pleases if she does not want to be both at once. She has that ultimate power to hold power or to live as a human. Riley and Anya cannot control their fates, and they are destined to lead mortal lives with remembrance of the strength and power that they once held. They were able to live as superior beings, but they know that they can't return to those states, which makes it harder for them to live on as humans.
I think that Jekyll is similar to these two in that he wants to live as a super-human, with his own laws and his great strengths that govern his ways, but he also has to be the weak and wise old doctor. When he first starts using the potion, he thinks that he, like Buffy, can control the switch back and forth, but eventually, the rush of the immortal feeling takes control of him (like Riley with the vampires and Anya when Xander leaves her at the altar). This also brings us back to Hush, where Buffy goes out not patrolling, but hunting, because the one side of her, the Slayer side, is starting to overwhelm the valley girl side. It seems clear that the side of agility and strength will always dominate within a person, and it takes a strong willed person to push the balance back into equality, which Jekyll, Riley, and Anya cannot do.