Noted for being very selfish and filled with ego and greed, Eggman is as well extremely narcissistic and egotistical, having a tendency to plaster his persona all over his creations and bases to fuel his ego. Other times, however, he may also focus his work around other themes. Because he places so much value on aesthetics, specially his own, his design philosophy regarding his inventions often focuses on design and gimmickry more than necessary. Overflowing with self-confidence and pride, he always highlights his "scientific genius" when introducing himself, and due to his self-centered character, he hates it when others interrupt his speeches.