I don't think the Leviathan arc was that bad. Granted, I found Jeb to be thoroughly unlikeable, and the relationship between Jeb and Megan rubbed me the wrong way, but I found everyone fawning over Jeb or one of his child forms to be rather amusing. Actually, it was a lot like the fourth season of Angel, but I'm getting off-topic here. Megan's mad thrashing about while calling for Barnabas was pretty hilarious, too. Sorry to say I'm with the majority, though, when I say that I didn't really like 1840 or either Parallel Time. Well, I liked 1840 a little, but I could have done without the Parallel Times, though admittedly I found the fact that there was a Buffy (spelled differently, granted) on Dark Shadows to be amusing, too.