What does it take to make a Creepypasta "good"? I looked around the wiki, and I see stories that are popular/mainstream, but I don't see a common thing about them that make them popular (aside from being proofread spelled and punctuated correctly).

For me, I think I'd like pastas with developed characters, or one that puts you in a position where you have no idea what the hell is going on until the very end. I haven't run across many of these, though. Perhaps I should make one?

I think there's something everyone's looking for in a creepy story, but I can't put my finger on it.