Tony Stark is, for the lack of a better word, complicated. During his early days of success, Stark was a man who only cared about fame and wealth. He had no sense of responsibility or humility, always rubbing his success on the face of everyone he met. This all changed when he was captured by terrorists. After building the first Iron Man armor and escaping captivity, Stark had realized the kind of person he really was and engaged in a life of heroism to atone for his past mistakes.
Plagued by many vices, Stark is prone to womanizing, pride and most surprisingly, alcoholism. This lifetime of troubles has caused him to develop a cynical view of the world. Despite this, Stark is devoted to truly make the world a better place.
Iron Man is a hero that relies on his intellect and technological resources to defeat foes and achieve victory. Stark invariably prides himself on being one of the most intelligent people of the Marvel Universe.