I actually never liked the idea of tentacles. It makes him seem less scary.
I think the more human he is, the more frightening he is. Slenderman should be a subtle horror. From a distance it seems like a man in a suit... but you take a second look... and something seems horribly wrong.
Also he's scarier when he moves. Just standing there isn't good enough. In an early Marble Hornets entry you can see him walk slowly by and peer into the window!
Now that's pretty scary.
I think the more human he is, the more frightening he is. Slenderman should be a subtle horror. From a distance it seems like a man in a suit... but you take a second look... and something seems horribly wrong.
Also he's scarier when he moves. Just standing there isn't good enough. In an early Marble Hornets entry you can see him walk slowly by and peer into the window!
Now that's pretty scary.