oh, that's right, many of your fandoms seem a little dark so I don't blame you if you don't want to live with Hannibal or the Walking Dead! :p

I haven't picked a dream world yet either but how about starting from the other end - just list possible 'dreams' and see if any of them have any resemblance with any of your fandoms? Like, idk, it could be something as simple as having a great group of friends and having fun with them, and almost any show features friendships :) ooorrr maybe something like having fun adventures in some cool locations, or studying the mysteries on the LOST island or time travelling with the Doctor or something. I'm sure it doesn't have to be something you actively dream about, just something you could find appealing enough!