My favorite tale would probably have to be the Hyacinth one. I suppose I just found WAY too much entertainment in imagining Apollo and Zephyrus fighting over poor Hyacinth. Especially since it's not a female they're fighting over, it's a dude. They're all dudes! xD Maybe it's just me, but I found it hilarious.
I absolutely believe that people find such interest in Greek mythology is merely because of the teenage series that are booming all over the market. Authors are making Greek Mythology quite popular. However, I have never very much read any of these books, I discovered mythology when I was a child, since my parents were very traditional and such, they taught me Celtic mythology.
I think they're interesting because of the fact that all of them are different, and have brilliant personalities that stick to peoples hearts. :3