I'll start with Vampires just for something different.
The first of their kind, Count Dracula was created by Bram Stoker, correct?
Where do you think he got the idea from? He used a particularly blood-thirsty prince, Vlad Dracula (more commonly known as Vlad the Impaler) as his inspiration.
True vampires the way we have been brought up to know them as? Who knows for sure. I've heard stories that have come out of the far eastern parts of Europe (as is to be expected ;]) that they exist. Until I see proof in front of me, idk.
Spirits, ghosts, demons and the like, obviously anyone who is of any sort of spiritual background must believe these exist. Possession is highly likely to be believed in religious circles, how could it not, to believe in God, heaven and the angels then one must also believe in Satan, hell and demons.
Spirits and ghosts, very similar entities. I think that people need to start believing what they see with their own eyes and stop just putting things they cannot explain down to "oh, it must of just been my imagination".
One thing that has not really been touched on as such is premonitions.
My girlfriend and I were actually talking about this the other night. Our situation is that of a long distance relationship, for the time being.
I was telling her stories of the times I have had what seems like deja vu while talking to her on the phone.
A theory we have come up with is this;
It is said that humans use a ridiculously specific 10% of their brainpower. How they measured this I would love to know, but that would be a discussion for another time.
Now apart from the regular masses that only use this 10%, there are those all over the world that can manage to use more.
What our theory is, is that I personally, can use a higher percentage of my brainpower, while sleeping and that in my subconscious, time is of no relevance and the past, present and future has all already happened and that the concept of time is just the conscious way of categorizing all the different events that I live in my sleep.
All that is left for me to do is to work out how to tap into that higher brainpower while conscious.
I think with a little bit of study and research, and a little determination it might be possible.
After all, it is said that the human mind has infinite possibilities.
Just quickly before I finish this off and go to bed.
There have been alot of cases of Stigmata from all over the world over the years. Something else to throw into the conversation.
I'll go looking for examples and other various research notes tomorrow when I'm alot more awake.