Because you like Hal 9000 in 2001: A Space Odyssey
Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.
Michael Scofield is no criminal, and he didn't get jailed by accident. See them in Prison Break.
Leone Montana is a fearless hitman with a surprisingly sensitive side. See them in Leon: The Professional.
Sometimes being a supportive girlfriend like Ophelia doesn't work out too well. See them in Hamlet.
This lab mouse has one thing on his huge brain: trying to take over the world on a nightly basis. See them in Pinky and the Brain.
Hoban Washburne shows you can be a hotshot space pilot *and* play with dinosaurs. See them in Firefly.
Despite the war-torn world around him, Mal Reynolds still holds onto the shred of hope that life can be more than just living another day. See them in Firefly.
Tom Haverford is set on being a world-renowned entrepreneur who dates models. Problem is, he's stuck in Indiana with a lazy business partner. See them in Parks and Recreation.
Working as a captain in the American Expeditionary Forces and a spy for British Intelligence, Steve Trevor wants to end World War I once and for all. See them in DC Extended Universe.
Javert is an inspector with a single-minded focus: to bring criminals to justice. See them in Les Miserables.