Harry Potter Themes

Lately I've been obsessing over what I would tell someone if they asked me what the themes in Harry Potter are. I have a slightly gargantuan list established, however I've always been a little fuzzy on what exactly a theme is. Ironically, I love English class and intend on majoring in English Literature in college this fall (You'd think I could at least understand themes!). So my list includes:
1. Love
2. Loyalty
3. Family/Friendship
4. Good VS Evil
5. Free Will/The Power of Choices
6.Life Isn't Fair
7. Appearances Are Not What They Seem
8. Bravery
9. Overcoming Pain/Trial/Circumstances
10.The Inadequacy of Government/Anarchy
11.Quest for Power
12. Everyone Dies/Accepting Death
13.Sacrifice
14. Equatlity/The Worth of All People
15. The Strenght of Outcasts
There are probably more. I'm pretty sure that Dumbledore's having blue eyes is a theme. It's often mentioned. Let me know if you think of any or if there are any blaring issues with this list.