Because you like Mark Watney in The Martian
Damon Salvatore used to miss being human. Now he can't think of anything more miserable. See them in The Vampire Diaries.
Brian Griffin is the most scholarly member of the family—when he's not drunk on martinis. See them in Family Guy.
As the hero of time, Link is reborn throughout history, always with the purpose of fighting and defeating the evil Ganon. See them in The Legend of Zelda.
A karate master/rocket scientist/squirrel, Sandy Cheeks is the only one who can clean up the other resident's messes in Bikini Bottom. See them in SpongeBob SquarePants.
D.J. Tanner is a rebellious teen who wishes her lame dad would butt out of her personal life. See them in Full House.
Donna is boisterous and spunky traveller of the TARDIS, exploring worlds beyond the simple mundane enterprises of Earth. See them in Doctor Who.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Emily Fields has been very guarded, careful of whom she trusts and reveals her secrets to. See them in Pretty Little Liars.
Rose Tyler may have not done too well in school, but she's certainly holding her own in space. See them in Doctor Who.
Jesse Aarons' frustration can only find outlet in another world. See them in Bridge to Terabithia.
Privileged young Bruce's childhood was nearly perfect. Now, his life is anything but. See them in Gotham.