I've looked around at various amounts of descriptions of my personality type as Myers-Briggs has it (for those who haven't followed me anywhere, I've been typed as an INFJ), and so many of those descriptions make it sound like I as well as my fellow types are engrossed in dark things. I'm not one of them. For me, it's not an obsession with darkness as much as it is a willingness to accept that darkness exists. I don't dismiss it, and I'll allow it to some extent. I know a lot of people (particularly females) who will not watch a story, because of some sad or serious part in it. Depending on the context, I may embrace those. For me, darkness is a necessity to show us the joy and triumphant the moments are when the light defeats it. I'm a fan of Charles Dickens for this reason. His stories can be extremely dark, but mix in moments of the juxtaposition of the most beautiful things life can offer and you've got one great inspiring message of hope.
To focus entirely on darkness is too gloomy for me. I'm one of those weird people who grew up trying to understand people's fascination with evil, so while everyone else want going googly eyed over Darth Vader, I was a huge fan of Luke Skywalker. It brings back to mind my little interaction I had during my last visit at Disneyland where I encountered the Evil Queen. I know other people love to visit with her and have fun with her, and I love watching the interaction, but in my natural tendencies I would have avoided her for a variety of reasons. That particular day I had a drive that took me to unusual situations, and this one took a lot of energy. The account of that day is recorded on an earlier post: https://www.quietlifeobservations.com/2019/12/the-enlightenment.html. While I get glimpses at times why people find the villain attractive, I'm not won over. I'm a protagonist fanatic all the way.
In conclusion, I am not obsessed with darkness, but I accept it exists. I don't believe in cutting it out entirely as it brings out an important contrast with the light that helps you understand the light in a much clearer view than without it.