Because you like Firo Prochainezo in Baccano!
There's nothing like discovering dear old dad is a serial killer to send you into an (understandable) funk. See them in Hannibal.
With those dearest to him dead and no one to trust, Max Rockatansky is a slightly hysterical man alone on the run in a post-apocalyptic world. See them in Mad Max: Fury Road.
Bojack Horseman is a former sitcom star who loves sharing his opinions with anyone who will listen. Oh, and drinking. A lot! See them in Bojack Horseman.
Roger is a pansexual alcoholic non-human who will happily lie, cheat and steal to get what he wants. See them in American Dad!.
Emmet Brickowski is so upbeat it's not even human. Everything is AWESOME! See them in The Lego Movie.
R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.
A dedicated hedonist, Jack Harkness appreciates raunchy stories, stiff drinks, and excellent bottoms. See them in Doctor Who.
Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.
Galina Reznikov is the head chef of prison, cooking up meals as well as storms on anyone who dares to cross her; even the guards are terrified of her. See them in Orange Is The New Black.
A daring conman, Flynn Rider is so charismatic that you might not mind when he steals from you. See them in Tangled.
Tony Stark's interests include cocktails, beautiful women, particle physics, and saving the world. See them in Marvel Cinematic Universe.