Because you like David Rossi in Criminal Minds

This android may not have emotions, but Lt. Commander Data's curiosity about humanity is endless. See them in Star Trek: The Next Generation.

This lab mouse has one thing on his huge brain: trying to take over the world on a nightly basis. See them in Pinky and the Brain.

Patrick Verona is a bad boy who's after a tough girl. See them in 10 Things I Hate About You.

Rory Williams is a caring companion whose specialty is looking after others. See them in Doctor Who.

A librarian and aspiring Egyptologist, Evie O'Connell would rather have her own adventures than just read about them. See them in The Mummy.

Egon Spengler prefers collecting spores, molds, and fungus to interacting with people. See them in Ghostbusters.

A passionate paleontologist with interests no one seems to share, Ross Geller tries to find love despite his past of abandonment and an awkward personality. See them in Friends.

Mitchell Pritchett prefers to have a place for everything and everything in its place. See them in Modern Family.

A blood-thirsty warrior on the battlefield, Ragnar Lothbrok is a dedicated family-man at home. See them in Vikings.

Miss Peregrine exists to protect her wards, whether they like it or not. See them in Miss Peregrine's Home for Peculiar Children .

Nothing inspires dread like the mysterious, masked Man in Black. But what's he hiding? See them in The Princess Bride.

As high-strung as she is talented, Rachel Berry both marches and sings to the beat of her own drum. See them in Glee.