I lost track, too. Somewhere around 528. Birthdays really kind of lose their meaning when you're immortal. Wow. I've never heard of a vampire actually having a child after they become a vampire. A hell dimension really doesn't sound like a good time. Still kind of surprised I'm here and not in one myself, really.
So humans in your world must be pretty terrified of vampires if so many of them are running around killing people left and right. My powers of observation and figuring things out. And I also tend to be incredibly single-minded when I have a goal. So determination, I suppose. It's not necessarily always a good thing. But it is what it is.