I have dreams all the time that people would classify as Nightmare-ish.. blood chambers, ghosts, dead people .. etc. but they arent nightmares b/c im so used to that stuff, whether in movies or all the time in my LDs and dreams.. Nightmares for me is when someone I love and are close to die, or if something extremly horrifying like oh god i dont know.. evil man-eating butterflies suddenly decide they want me to dance hiphop for them. that would be a nightmare.. lol but yeah some ppl have nightmares, some dont.. all depends on who you are.. (and how many horror movies you watch)