Why do we like Halloween so much?

Halloween is definitely one of my favorite festivals. Regardless of whether I am dressing up and going out or just staying home and handing out candy, it’s always fun and gives me a very happy feeling. But I can’t pinpoint why this is the case. I know one theory is that it’s a day where people get to be someone else. Maybe this is true for some. What are other possible reasons for Halloween being so well loved? Why do you think you like it?