I wouldn't judge yourself harshly for what you like/don't like about getting to sleep just because it is different from what you think is the "ideal". I'd buy myself a nightlight or leave hall/living room lights on (I use to do that when my husband went out of town) and think of ways to comfort myself. I have a good imagination too and get to imagining things but either rein myself back in (realizing that I can't know the future and if I'm going to imagine it, I might as well imagine good things as scary ones?) or think of a way to work on whatever I imagine that bothers me.