I am a student and have interest in many things - computers, science, history, sci-fi, fantasy, music, and so on. Dune is one of my favorite sci-fis, and I was lucky enough to have a friend who introduced me to it one summer. I have read the first (original) series of the three books and the prequel trilogy.
My favorite Dune book is Dune. I think it has no compare and it has the most compelling characters. My opinion on the KJA/BH books can be seen below. On the other hand, I am a fan of the Dune Encyclopedia and do consider parts of it canon for myself. Each to their own! I was excited this wiki had the three categories to easily avoid unnecessary debates. Ya ya yawm!
Lastly, my favorite characters are Piter de Vries, Count Fenring, and Emperor Shaddam, so I hope to spiff up their pages every now and then for great justice.