Because you like Howard Wolowitz in The Big Bang Theory
Greg Heffley will be famous someday, but now he's stuck in class with morons. See them in Diary of a Wimpy Kid.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Talos is a mysterious military commander skilled in the art of deception. See them in Marvel Cinematic Universe.
Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.
Robin Scherbatsky is a former teen pop star who loves dogs and is scared of relationships. See them in How I Met Your Mother.
Andy Bernard is a preppy Cornell grad who's very likely to break into an acapella performance. See them in The Office.
Disgust is a friend who makes sure you stay away from all things gross. See them in Inside Out.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
Thanos is an intergalactic warlord, on the hunt for infinite power. See them in Marvel Cinematic Universe.