Recurring nightmares! When I was little I had the same few nightmares over and over. There was one in particular that stuck with me though. It involved a puppet-like character, sort of like the characters on Sesame Street. In my dream, just like on Sesame Street, it was perfectly normal for puppets to talk to people. This puppet was sort of horse-like, with a long face/nose, the way a horse is. In each dream this horse puppet would come over to my house and ask if I could play. I didn't want to, but my mom would always tell me to anyway, to be polite. So I would go, and in each dream we would start to play but then the puppet would eat me. The way he would eat me would be the way Cookie Monster eats a cookie; loudly grunting and pieces flying all over the place. The pieces flying about looked like bits of styrofoam and that's when I would wake up. To this day when I see horses or anything else with a long face like that (some dogs have it, cartoon characters, etc.) it gives me a weird irrational feeling.
Another dream I had frequently had a few variations but it always involved any weird creatures that I had seen that week on Star Trek (the original). One time they were flying pancake-like things; another time large balls of hair. The story was this: I would be at my school in my pajamas and the Star Trek creature would be there attacking me and the other children. Most of the time I would startle awake, but I distinctly remember one time that the paramedics from the TV show Emergency! came and rescued us. So I guess my nightmares were not all bad after all!