Because you like Jason Nesmith in Galaxy Quest
Marge Simpson is a mostly happy housewife and subscriber to Sponge and Vacuum Magazine. See them in The Simpsons.
Moe Szyslak is the crabby owner of the grimiest bar in Springfield. See them in The Simpsons.
Charlie Bucket may be down-on-his-luck, but his spirits are always sky high. See them in Charlie and the Chocolate Factory.
Harrison Wells is a brilliant scientist full of secrets. See them in DC Extended Universe.
A stylish agent, Agent J would rather improvise than play by the rules. See them in Men in Black.
Jillian Holtzmann's madcap mind is always whirring and she will transform anything into one of her machines. See them in Ghostbusters (2016).
A short-tempered guy, Bowser is determined to wreak havoc on the Mushroom Kingdom. See them in Super Mario Bros..
Dallas Winston is headed down a dangerous, criminal road. See them in The Outsiders.
Jacob Kowalski is just a baker caught up in an otherworldly adventure. See them in Fantastic Beasts and Where To Find Them.
Thanos is an intergalactic warlord, on the hunt for infinite power. See them in Marvel Cinematic Universe.