This guy is the inventor of the sword Ascalon, the Omnitrix, the Ultimatrix, Galvan Mk.II among other things. For an amazing inventor that is obviously over 2000 Earth Years Old, you'd expect him to be slow and gentle like the mentoring Yoda from Star Wars or the kicking Mr. Miyagi from The Karate Kid. But obviously we were mistaken about this as he's bitter and no-nonsense serious when it comes to everything. AND WE ALL LOVE HIM FOR IT!! Who cannot love a Yoda figure that can complain to you every single thing you are doing wrong with his stuff?! He's like the Nostalgia Critic of Galvan Technology and how it's supposed to work.
Bottom line: Azmuth is and always will be the single greatest character in the Ben 10 Genre.