This is a BAAAD cliche and one I usually rail against and yet I can't help but use it A LOT in my stories.
Stockholm romances. I just...I don't like READING them but that's because authors that use it are writing actual romance stories where the (typically) virginal heroine is held captive by the rugged asshole (but secretly has a heart of gold despite his assholish ways the fucking prick). Through their hilarious rapey hijinks the heroine falls in TWU WUV with the rugged debonair dickwad and they live HAPPILY EVER AFTER-
Sorry, cliches we love. I need to talk about cliches I love.
Anywho, normally I hate that cliche in vanilla style romances. However, I use it because I don't like the ROMANCE aspect. I like the CORRUPTION aspect.
I like the true darkness of it. I like the transformation and co-dependency that occurs between the two characters. I like how so many issues and darkness can just crawl out of such a toxic type of interaction. Thus why I can't help but use it and be inspired by it. When it's approached with a twisted, erotic acknowledgement of it's fucked-upness, I really, REALLY love reading it.
And writing it. It helps that I also subvert expectations with it in my story.
I also am a sucker for "I will go through HELL for you" idea of love. Nothing gets me more than a hero willing to sacrifice EVERYTHING for the one they love. I am just an absolute sucker. Especially if that love is earned and I buy into the relationship. None of that 'love at first sight, two stupid teenagers getting horny and mistaken it for love" crap. No! I mean "I have been with my husband for years and I adore him and his stupid little smile and if someone takes him away from me I will go through ANYTHING to get the man I love back!"
I also love Yanderes. Go figure.