Tony Stark
Easy one. What am I vain about? The amount of things I know. I don't even know how I managed to learn all those things, but what I know is that it's hard for me not to brag about knowing them – mostly because it's the only thing that doesn't help decreasing my already low self-esteem. Oh and also, it's always hard for me to realise that people don't usually know that much. But that's kind of a detail, I guess.









