Because you like Dirk Diggler in Boogie Nights
After having his mind altered after a bad breakup, Joel Barish is not convinced that ignorance is bliss. See them in Eternal Sunshine of the Spotless Mind.
A meticulous forensic scientist, Edward Nygma is insanely good at his job. Emphasis on the "insane" part. See them in Gotham.
The Genie is the perfect buddy, granting every wish we might have and keeping life good-spirited. See them in Aladdin.
His name is Chucky, and he's your friend till the end. Hidey-ho! See them in Child's Play.
Whether it's a fire or a pit of lions, there's almost no predicament that Violet Baudelaire can't get her and her siblings out of. See them in Lemony Snicket's A Series of Unfortunate Events.
This suave con-man doesn't just want to become rich. Danny Ocean wants to rip off the guy who stole his wife in the biggest Vegas con. See them in Ocean's Eleven.
Just call Jeff Lebowski The Dude. Or His Dudeness, Duder, or El Duderino if you're not into that whole brevity thing. See them in The Big Lebowski.
Ash Williams is a houseware clerk at S-Mart and the Chosen One. See them in The Evil Dead.
We're all puppets. Dr. Manhattan is just a puppet who can see the strings. See them in Watchmen.
Harry Osborn is the privileged son of Oscorp's founder with a goblin-sized chip on his shoulder. See them in Marvel Cinematic Universe.
World domination and Superman's demise are next on Lex Luthor's to-do list. See them in DC Extended Universe.