Because you like John Watson in Sherlock

While Cassie Ainsworth's head is always in the clouds, her heart is always in the right place. See them in Skins.

You wouldn't know it by looking at her, but beneath Sheila Jackson's sweet, motherly exterior lies a sex addict. See them in Shameless.

Chanel Oberlin is a big fan of herself, and she can't see why anyone else wouldn't be too. See them in Scream Queens.

Love Quinn is a trained chef and excellent girlfriend, but she's hiding something dark. And bloody. See them in You.

Trevor Phillips is an unpredictable maniac who tortures people for no reason. See them in Grand Theft Series.

You'll never get Alaska Young. And that's the whole point. See them in Looking for Alaska.

Herion is Mark Renton's favorite drug. He sniffs it, smokes it, swallows it, sticks it up his arse, and injects it into his veins. See them in Trainspotting.

Pro tip: the psych ward is not the best place to find a mentor like Lisa Rowe. See them in Girl, Interrupted.

Andrew Glouberman is trying to make it through puberty with his sanity intact. See them in Big Mouth.

A star student destined for Princeton, nerdy Devi Vishwakumar dreams of losing her virginity to a stone-cold hottie who can "rock her all night long." See them in Never Have I Ever.

A neurotic people pleaser, Tom Wambsgans is both ambitious and spineless. See them in Succession.