Well, I'm zero on the Potter experience/interest chart. And I'm not entertained by just spectacle - but if there's a good story to go with it, I'm interested.
I tried choosing one part in the first ticket go-round (I was a late code-receiver), and they showed me no dates for which I could buy a ticket (and I think, if you choose one part, it could only be part one). So, I guess it's really out of my control anyway.