I thought the newest Potter movie was ok, but to be honest I found this latest installment lacking in some ways. There wasn't much drama or humour in the movie and I found it be less exciting than the previous installments. Maybe I didn't like it as much as I read the book first and the book was fantastic! Somehow I felt that this movie didn't do justice to the book.
As for scary movies, I can remember when I was little and watched Poltergeist at the theatres... don't think I could sleep for a week.
Ah, the Birds, that is a great classic Hitchcock film. That one didn't really scare me even when I was little. I get the most scared by watching ghost movies.