Thanks for the input!
One of the things I was thinking is that, when they enter the dreamscape their OWN subconscious would recreate them into an "avatar" of sorts. So a person who in the real world had a thing for elves, would actually materialize as an elf. Given that, I agree about never having a dream where you didnt know how to do what you were trying. Thats part of whats awesome in a dream. SO its either similar skills, or create an alternate persona...same attribute but with fantasy skills.
But how to get them to do it without giving it away is the question!