I'll sometimes have 10th kingdom marathons. :3
I really like what I've seen of Once upon a time so far, another interesting show to keep an eye on in the same vein would be 'Grimm' too.
I'm still uncertain about Grimm, though it's certainly not horrible. It's written by the co-creator and lead writer of Angel, so it has that in its favor.
I've been hearing about Once Upon a Time a bit, and it looks to have one of the actors that was in Stargate Universe. However, it's an ABC show, and it was created by the people who created LOST, and both of those are pretty heavy strikes in my book.