Because you like Mark Watney in The Martian

Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.

Poison Ivy is a seductive, venomous botanist laments the fact that there are so many people to kill, yet so little time. See them in DC Extended Universe.

A powerful dragon-hunting warrior, Dovahkiin is destined for great things. See them in The Elder Scrolls V: Skyrim.

Ron Burgundy is a news anchor who signs off with "Stay classy, San Diego" or whatever his teleprompter says. Bonus: he plays the jazz flute. See them in Anchorman: The Legend of Ron Burgundy.

Daxter is half otter, half weasel, all snark. See them in Jak and Daxter.

An intriguing bundle of contradictions, Sawyer Ford trusts no one on the island, and no one should trust him. See them in Lost.

Tiffany Maxwell wishes people would stop reminding her about her dead husband. See them in Silver Linings Playbook.

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.

Carl Fredricksen is a crotchety old man who may just have it in him to take one last, great adventure. See them in Up.

N'Jadaka is a righteous man with a violent agenda. See them in Marvel Cinematic Universe.

Wario is greedy, gross, and gluttonous. See them in WarioWare.

Just call Jeff Lebowski The Dude. Or His Dudeness, Duder, or El Duderino if you're not into that whole brevity thing. See them in The Big Lebowski.