Which Firefly character do you find hardest to write? I find myself struggling with River. Especially in post-BDM fic because I want to show that some progress has been made in terms of her mental health, but I don't think it's appropriate to show her as being fully healed either. And in pre-BDM fic, I find it sometimes hard to capture the 'she's-crazy-but-she-kinda-makes-sense' vibe that the show's writers did so well.
River is the hardest for me. It's very difficult to get the tone of her voice right. She doesn't use big words, but what she says is often very convoluted and hard to follow, but when you get the trail it sorta makes sense.