Like Bobby Byrd says on Pass the Peas "Because it makes me haaaaapy"
Pros? Fer me I wanna be shocked out of my mundane reality. Brutalize my perception,stain my mind with images that are hard to shake off. When I come down off of a good horror read or flick everyday life looks pretty good in comparison.
Cons? Pessimism fer one... Horror tends to darken my perception of things around me making me see the dark sinister of everything in life and in others...
One flick that really did a number on me was RZ's The Devil's Rejects....the sheer brutality the victims have to endure....the one scene where the chick is taunted with her boyfriend's cut off face bein' used as a mask...only to have her get run over and splattered by a truck.....Fantastic stuff
That thing about the white blood cells tho now that's good news!