Hmmm... interesting topic and replies. I spend far more time here lurking than posting (i only get into trouble here when i post anyways), but occasionally, i have a thought.
I must confess, i am addicted to those cheesy, overly-PC and PG, 'saccharine' (my mom calls them) TV Christmas movies. I watch them for two months every goddamn year. Strikes that romantic note in me i guess (i'm actually a big romantic). Yeah, it'd be nice if they weren't so maddeningly formulaic and utterly predictable, but that's what you get. Beyond these, and the occasional well-written romance with a good story, i just cant do happy shit. I get nothing from it. It does not make me feel. I dont get... the feels. What i do like, is the darkest, blackest, sickest, most shudderingly depraved visions of our world, and us in it, that i can find. You know... truly plumbing the depths of the beast in man. Most of the movies i love, others cant even watch. The darker, the better (and i'm not speaking of horror movies). I'm pretty jaded... i've seen a lot, done a lot. Nothing, and i mean nothing shocks me, and i'll mentally/spiritually explore ANY demon, so when i seek out fiction, in any medium, well... i want to feel something, or i want to be intellectually stimulated. What i wouldn't give to find that shock that 'normal' people get when they watch ugly stuff. When i write? Its dark. If made into movies my writing would be X-rated, and not because of any porn content. I do love the contrast though, and no darkness has a shred of power without it. I think i write both ends well. Done well, and to extremes, you can create art that will survive time. I aspire to that.
As for writing it. I can live in that dark world for months on end, and it doesn't affect my moods. If anything, i find 'getting it out' cathartic, and in a way, almost like a therapy. I wasn't prepared for that when i started. The music i listen to is far darker than any fiction, and after decades of that i am still (to ask around) easily one of the most positive and unassailably high-toned people around. Its funny... i find i write my best romantic scenes when listening to black metal. And (i'm told at least), they're pretty 'saccharine' in their own right.