Because you like Harvey Specter in Suits
A formerly adventurous playboy, Will Traynor has become cynical by what life has thrown at him. See them in Me Before You.
Catwoman might be slightly unhinged, but you can't say this feline villainess isn't confident. See them in DC Extended Universe.
Wheatley's got an endless supply of bad ideas that he wants to share. See them in Portal Series.
Cosette is an idealistic woman whose innocence stands in contrast to her harsh childhood. See them in Les Miserables.
Amy Santiago likes following the rules a little too much. See them in Brooklyn Nine-Nine.
With an abundant supply of alcohol, nice restaurants, and free will, Crowley is a demon who is thoroughly enjoying his time on Earth. See them in Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch.
Caitlin Snow believes that burying herself in science is the best way to save the day or to mend a broken heart. See them in DC Extended Universe.
Alex Danvers is a brilliant engineer tasked with alien threats, and one of those aliens is her adopted sister Supergirl. See them in Supergirl.
Deadpool thinks life is an endless series of train wrecks with only brief commercial-like breaks of happiness. See them in Deadpool.
Ethical but anxious, Chidi Anagonye approaches life like a problem to be solved. See them in The Good Place.