What is your favorite Greek myth?

I started getting interested in mythology when I was about 8 years old. My mother gave me the D'Aulaires Book of Greek Myths and I just loved it. I was captivated by the stories, loved the pictures (I used to draw them) and just really got into the whole mythology concept. When I found out that you could take classes about mythology in college, I thought that was great. Now, I am teaching it and I still love it. Most kids like it as well. So, what is your favorite Greek myth? I have always loved the stories about Demeter and Persephone. Guess it just appeals to my dark side.