Because you like Skyler White in Breaking Bad
Barbara Kean is loving, selfless, and caring. But, she's less stable than she'd like to admit. See them in Gotham.
Cinderella will sacrifice herself to keep her family's memory alive. See them in Cinderella (Live Action).
Kathryn Merteuil may be a vain sociopath, but you won't be able to look away. See them in Cruel Intentions.
Wanderer is a Soul, a parasite sent into a host to take over their body, extracting information from them and colonizing their species. See them in The Host.
This barber doesn't cut hair. Sweeney Todd sends his clients down a chute to be baked into his partner-in-crime's pies. See them in Sweeney Todd: The Demon Barber of Fleet Street.
Sally Albright is high maintenance who she thinks she's low maintenance. But she's still worth it. See them in When Harry Met Sally....
Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.
Kind and friendly, Rinoa Heartilly is nonetheless an effective freedom fighter. See them in Final Fantasy Series.
An undercover DEA agent, Max Payne is too focused on avenging the past to plan for the future. See them in Max Payne.
Jade Jade Harley might not be the best at reading social cues, but her bravery and selflessness means she's a great friend to have. See them in Homestuck.
The destroyer, Drax lives for one thing and one thing only: revenge. See them in Marvel Cinematic Universe.