How about the fact that it's a highly original blend of melodrama, gothic romance, the supernatural - with complex characters and relationships that span generations, and reinterprets those characters in interesting ways in different time periods, while still focusing on the effects of all this on a modern day family and personal relationships such as unrequited love, while frequently drawing on primeavel fears and archtypes? Those are just a few thoughts that spring to my mind.
I just moved (back home to Maine! Yay!) so I haven't been around at all.