Glee Season 1:
Rachel Berry's unpopular but has ambition and real talent, like a real person.
Glee Season 2:
Rachel Berry's slightly more likable and gets her heart broken, also like a real person.
Glee Season 3:
Rachel Berry is the single most important person in THE WORLD AND MUST GET EVERYTHING SHE WANTS.
Glee Season 4:
Rachel now has to work for most of the things she wants and nothing is guaranteed anymore.
Glee Season 5:
JUST KIDDING! Enjoy your lead role on Broadway!
Glee Season 6:
Rachel has finally lost everything, but people still want to tell her what a star she is until she believes it again and gets more opportunities dropped into her lap. And eventually wins that Tony.