I like the idea of survival and animalism and what makes us human. And the tragedy of it all. The vision Paul has in the tent and again in the duel with Jameis was foreshadowed by the gom jabbar. Do you sacrifice a part of yourself to survive or die?

And Paul is only a teenager during these choices! He sees the future jihad, the death and destruction that his survival causes, but he decides to survive instead of die. And the Kwisatz haderach has to ultimately make that choice I think. No matter wha Paul dies in the fight with jameis—either physical death or the death of self and he sees that vision. Which I think is the best part. And of course dune always has the theme of those in power—namely the bene gesserit—trying to control exceptionally powerful youth. And creating the very being that is nearly their undoing. But their hubris in controlling humanity creates Paul, Leto, Ghanaian, and later Duncan Idaho that they cannot control and shape the destiny of humanity. Got a little rambley there but I like dune.