Interactive dreams would be great, but they would have to be limited to happen only during certain quests. other than that text is good to describe vampire dreams and such.
INTERACTIVE VAMPIRE DREAMS WOULD SCARE THE [censored] OUT OF YOU!!!!!!!!!!!!!!
imagine going to bed,finding yourself on a hil with some kind of stonehenge esq thing, and hooded figures surrounding you, you run and find out that you are running slowly, very slowly, a hooded figure crawls over to you and takes you to a stone alter, and the figure bites your eye- you wake up.
or you walk into a house, a child is playing by the fireside. the parents come in and tie you to a table, were they torture you (the child helps) afterwards they throw you into the fire and you wake up
anything realy messed up would be awsome