What's Personal Horror?

Hello everyone, i wonder what's your take on personal horror? The only definition i found is in the unofficial white wolf wiki and i found it quite shallow. I mean, the hunger and frenzy mechanics sure adds tension witch can become a frightening situation in some scenes, but the part of becoming a monster seems out of place. The hole point of vampires is not become that monster, so what if i and my friends want to play a game were our npc enjoy being vampires without becoming Sabbat pricks? How would/could personal horror manifest?