Because you like Serena van der Woodsen in Gossip Girl

Optimus Prime is a shapeshifting sentient robot leading a team of robots to stop evil from taking over. See them in Transformers.

Although Borat has a curious mind, he has no filter, and some very out of date views on just about everything. See them in Borat: Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan.

Tobias "Four" Eaton is only afraid of four things, but you should probably be afraid of him. See them in Divergent.

After Otto Octavius' accident, he becomes fixated on finishing the reactor at any cost. See them in Marvel Cinematic Universe.

Although Penny's friends have genius-level IQs, they regularly come to her for advice and insight. See them in The Big Bang Theory.

An ambitious man of science, Norman Osborn has become green with envy over Spider-Man's powers. See them in Marvel Cinematic Universe.

Stuck in space, Ryan Stone will either make it back to Earth and have one hell of a story to tell. Or she will burn into the ether. See them in Gravity.

Jim Halpert is a master at the art of making it through the work day, including participating in an office Olympics. See them in The Office.

A no-nonsense hitman with a taste for good burgers and divine justice, Jules Winnfield will go to great lengths to please his boss. See them in Pulp Fiction.

In Dennis Reynolds' mind, only a psycho wouldn't have a six-part system to bring home women. And he should know. See them in It's Always Sunny in Philadelphia .

A debonair spy, Harry Hart is the epitome of a gentleman, even when he calmly takes down multiple men with a militarized umbrella. See them in Kingsman: The Secret Service.