Because you like John Tyree in Dear John
Rick Sanchez is a gruff, alcoholic mad scientist, with the emphasis on "mad." See them in Rick and Morty.
Lelouch vi Britannia is a high school student by day, masked destroyer of tyrannical empires by night. See them in Code Geass.
A self-professed psychopath, James kills small animals for fun. After getting bored of that, he is ready for an ambitious murder. See them in The End of the F World.
Serena van der Woodsen is a wild child. Too wild, her friends and family might argue. See them in Gossip Girl.
When Rin Matsuoka is not swimming, he mostly spends his time brooding or listening to angry Dubstep. See them in Free! Iwatobi Swim Club.
An aloof punk rock goddess, Nana Osaki has a surprisingly big heart. See them in Nana.
After becoming accepted into the group of popular girls, Tracy Freeland has turned from a sweet and reserved teenager into a monster. See them in thirteen.
A deadbeat dad and small-time con-artist, Frank Gallagher gives nothing and yet expects everything. See them in Shameless.
Applejack's practicality complements her caring nature. She is the loyalest of friends and the most dependable of ponies. See them in My Little Pony.
Butters Stotch is a kind-hearted student who likes ladybugs, Charlie's Angels, art class, baby-back ribs, and Little Bunny Foo Foo. See them in South Park.
The only defense Earth has against alien invaders are giant robots in the hands of pilots like Kaworu. See them in Neon Genesis Evangelion.
Tamaki Suoh is always the star of the scene because he's the one making a scene. See them in Ouran High School Host Club.