Bunnicula was one of the books that I loved reading as a kid. It had some mystery and interesting characters, but was just this side of ridiculous (I mean, come on, a vampire bunny who sucks the juice out of all the veggies?) I like the dynamic between all of the characters, how one dog was simultaneously smart (he's writing books after all!) and yet didn't really like to concern himself with much more than sleeping and eating.
I like how the Bunnicula never talks, even though all the other animals are very verbose, but yet we always seem to know what he's feeling. He has a very prominent role for a character that never talks.
Inevitably, the books end up being more about Chester (the cat) and Harold (the dog) then Bunnicula, so Bunnicula Strikes Again was a nice change because it focused on the bunny and his past a little more than we had seen before. But, inevitably, it was the same animals up to the same antics.