Because you like Martha Jones in Doctor Who
Hans Landa doesn't seem to have issues with Jews, but he hunts them because he's determined to do his job well. See them in Inglourious Basterds.
Edward Kenway can be reckless and greedy, but he's learning that his ancient ancestry carries a noble burden. See them in Assassin's Creed Series.
It's certainly easier to get great footage of crimes when you can guarantee they'll happen. See them in Nightcrawler.
A rugged frontiersman and consummate survivor, Hugh Glass has a relationship with the natural world that is downright spiritual. See them in The Revenant.
Blake Henderson is happiest smoking weed on the roof ‘til the end of time, but the real world just has a way of killing his vibe. See them in Workaholics.
Killua Zoldyck is so tired of killing. He just wants to be a kid, hanging out and doing stuff with his friends. See them in Hunter x Hunter.
Ciel Phantomhive is a haughty teenage nobleman who doesn't suffer fools gladly. See them in Black Butler.
An obsessive schoolgirl, Yuno has two sides to her personality, and both are equally unnerving. See them in The Future Diary.
Gregor Samsa is an ordinary man in an abnormal predicament. See them in The Metamorphosis.
Although Theon Greyjoy is treated well, he's still essentially a hostage. And that isn't so easy for him to forgive. See them in Game of Thrones.
Fun and feisty on the outside, Meredith Grey is dark and twisty on the inside. See them in Grey's Anatomy.