I haven't made up my mind. On one hand, I've had many moments in my life wherein I felt the presence of something, in addition to a lot of freak coincidences that have happened along the way, but I'm not decided on the subject of the paranormal. My opinion is, that when you die, you do release some sort of energy, but I have a hard time believing that that energy has a conscience, or that it would want to haunt anyone or anything.
Then again, I respect the fact that there are most definitely things that exist beyond our reason, and cannot be explained using the scientific method. Some coincidences tend to be too coincidental.
I have a story, but I'm really shy about talking about it because it sounds so incredibly naive... I don't know.