Because you like Hikaru Sulu in Star Trek
Keren Walker is a socialite looking to avoid work, keep a constant buzz, and be as snarky as possible. See them in Will & Grace.
With great power comes great responsibility, but Peter Parker always seems to get the short end of that bargain. See them in Marvel Cinematic Universe.
After surviving consecutive fights-to-the-death (damn you, President Snow!), Katniss Everdeen is thrust to the front lines of a real war. See them in The Hunger Games .
Simba just can't wait to be king, but he's got a lot of growing up to do first. See them in The Lion King.
Emmet Brickowski is so upbeat it's not even human. Everything is AWESOME! See them in The Lego Movie.
There's no obstacle too great for this charismatic treasure-hunter. See them in Uncharted.
A free-spirited artist, Marjane Satrapi is living under the shadow of an oppressive society. See them in Persepolis.
Introspective Theodore Twombly would rather observe life than participate in it. See them in Her.
Impassive, overly literal, and a little short on people skills, Angel dedicates her life to enforcing the rules. See them in Angel Beats!.
Cutting ties with her con-artist friends, Sarah Manning is creating a better life for her daughter by taking on the identity of the deceased Beth. See them in Orphan Black.
Everything is fascinating to Octavia Blake who has been locked away for her entire life. See them in The 100.