Because you like Ford Prefect in The Hitchhiker's Guide to the Galaxy

Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.

Reckless, vulgar, loud-mouthed: that's what makes Amethyst so awesome. See them in Steven Universe.

After surviving a CIA mission that was supposed to kill him, ex-military man John Reese bets it all on a chance to redeem himself. See them in Person of Interest.

With each reboot, Janet progresses more and becomes capable of human emotions. See them in The Good Place.

Evan is a sensible kid, but being sensible isn't going to help him lose his virginity. See them in Superbad.

Samantha Jones is a try-sexual who'll try anything once. See them in Sex and the City.

C is for cookie, and that's more than good enough for him. See them in Sesame Street.

Gina Linetti views herself as a sort of life coach/influencer to the rest of the office. She's not so keen on the "work" aspect of her job. See them in Brooklyn Nine-Nine.

Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.

Eric Forman's interests include smoking weed, collecting Luke Skywalker memorabilia, eating Fatso burgers, and making his dad mad. See them in That '70s Show.