This is for Saka and some others who have tried it or want to.
Have you ever written fanfic for another fandom? Did you find the change difficult? Have you ever taken one story from one fandom and changed it for another? If you haven't tried to write in another fandom yet, would you and which would it be?
I attempted to write a Harry Potter fanfic once, but I only got a few chapters into it before I stopped. I enjoyed it, but I struggled with having to make up what I didn't know because JK Rowling hadn't revealed it yet. It was a story about the Marauders - Harry's dad and his friends - and I wrote it before the 5th book was released, so there were 3 whole books of information I was missing out on. I didn't want to invent all these details about those characters, only to find out after the last three books were released, that they were wrong. I always said I'd go back and finish it after the rest of the books came out, but let's be honest; that's never going to happen LOL. I don't even read Harry Potter fanfic.
Besides that failed attempt, the closest I've come to writing for another fandom is with crossovers. I have written BSB stories that include NSync and other boybands and celebrities, some that I like and some that I don't. I have two crossovers in the works right now, one that's BSB/Harry Potter and one that's BSB/ER. I've enjoyed having the Boys interact with some of my favorite fictional characters and writing in those universes, but I don't think I would ever write in one of those fandoms (or any other fandom) without BSB.
I've never changed a story to fit another fandom. Most of my stories are pretty BSB-specific, and even in the AUs, the guys are written to resemble the guys, so they wouldn't fit another fandom without being completely rewritten, and I would never do that.