Tony Stark comes off like a flippant party boy billionaire who doesn't have a care in the world, yet underneath all that charm and arrogant mask, he's actually a harboring a brilliant mind, which he uses to create something that helps save the world. Those two contrasting elements to the character Tony Stark makes him that much more endearing. He reminds me of a cordial cherry - rock hard chocolate on the outside, but gooey sweet on the inside. Plus, the actor playing Tony Stark, Robert Downey Jr., does an amazing job bringing Tony Stark and Iron Man to life.