Because you like Xander Harris in Buffy the Vampire Slayer

Chuck Bartowski is a sweet, laid-back electronics store/top secret government employee. See them in Chuck.

A compassionate medical student, Martha Jones has found a Doctor she can really look up to. See them in Doctor Who.

Izzie Stevens is a model-turned-med student who can do it all, even if people underestimate her. See them in Grey's Anatomy.

Boomerang is equally skilled at tossing boomerangs and tossing back beers. See them in DC Extended Universe.

Hank McCoy is a quintessential nerdy scientist but with a few rather unconventional physical attributes. See them in X-Men Series.

Henry Mills is an idealistic young boy with the heart of the truest believer. See them in Once Upon a Time.

Lily Aldrin is a flaky but supportive kindergarten teacher and painter. See them in How I Met Your Mother.

Khan Noonien Singh is super strong, super smart, and out for revenge. He always seems to be two steps ahead of his enemies. See them in Star Trek Into Darkness.

Mr. Pink doesn't tip. Enough said. See them in Reservoir Dogs.

Green skin, pointy hat, evil cackle—this villain has it all! See them in The Wizard of Oz.

A kind, sensitive medical intern doing the best he can, George O'Malley sometimes struggles to keep up. See them in Grey's Anatomy.

A charming acapella performer, Jesse Swanson perfectly blends being nerdy with being cool. See them in Pitch Perfect.