Because you like Tim Lake in About Time

Jacob Black is the boy next door who's also the wolf next door. See them in Twilight.

A 100-plus-year-old who looks like a dreamy teenager, Edward Cullen warns girls to avoid him, which makes them want him even more. See them in Twilight.

A natural leader, Clarke Griffin dispenses both justice and mercy, and she does it all while being selflessly humble. See them in The 100.

Alison DiLaurentis believes you're always better off with a really good lie. See them in Pretty Little Liars.

It's hard to tell if Dean Winchester cares more about saving the world or his 1967 Chevy Impala. See them in Supernatural.

Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.

A benevolent madman with a blue box, The Doctor is traveling through time and space to heal the wounds of the universe. See them in Doctor Who.

Princess-turned-General Leia Organa is a sharp, fearless royal who gets herself into trouble and fights her way out of it. See them in Star Wars Series.

This metal-bending mutant may be misaligned with the genetically normal people of the world, but Magneto's got class for days. See them in X-Men Series.

A weather-controlling mutant, Storm doesn't just use her powers to ruin Magneto's day with unexpected showers. She is truly a badass. See them in X-Men Series.

With a unique ability to empathize with killers, Will Graham helps society but his sanity pays the price. See them in Hannibal.

Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.