Because you like Slartibartfast in The Hitchhiker's Guide to the Galaxy
Carl Fredricksen is a crotchety old man who may just have it in him to take one last, great adventure. See them in Up.
As a scaring Assistant, Mike Wazowski frightens children to collect their screams to be used as a power supply for the city. See them in Monsters, Inc..
She's mostly doom and gloom, but you'd get nowhere without Sadness. See them in Inside Out.
WALL-E is a quirky little romantic robot cleaning the wasteland known as Earth. See them in WALL-E.
Cynicism is his armor and words are his weapons, but what Tyrion Lannister would really like is some nice wine. See them in Game of Thrones.
Nemo is a small fish in a vast ocean, but he dreams of seeing it all. See them in Finding Nemo.
An All-American football player, a ping pong star, and a freakishly determined runner, Forrest Gump has a ton of stories to tell. See them in Forrest Gump.
A benevolent madman with a blue box, The Doctor is traveling through time and space to heal the wounds of the universe. See them in Doctor Who.
John Watson is haunted by his past (who isn't) but he's starting to branch out with some help from a world class detective. See them in Sherlock.