Todd Jensen writes...

By the way (also on that same document) I agree with you that a big problem with the notion of "Goliath as a human who was transformed into a gargoyle" is that the audience would be expecting and wanting him to find a cure, which of course would be out of the question in a television series since it would automatically end it. I found that particularly interesting since I've noticed that there are many cases of television series which have an explicit or implicit specific objective for the protagonist(s) which, if achieved, would automatically force the series to conclude. Thus, unless, the concept is handled extremely carefully, the series develops a note of frustration about it as the protagonist always has to fail to achieve his or her objective, to keep the series going.

"Gargoyles", fortunately, managed to avoid that problem by making the protagonists' goal something that was a journey rather than a destination. The gargoyles' goal is to survive in this strange new world, understand it, and protect it, all three ongoing quests rather than ones with a specific end of "We've done it; now the story's over". Which, I certainly believe, was a good thing for "Gargoyles".

(Of course, some of the spin-offs might be described, from what you've said about them, as falling into the "concrete objective" category, but even there, there were solutions to that here and there. For example, in "Pendragon", Arthur and Griff's goal is to find Merlin, but from the evidence that you've given, the story would definitely not be over after they do find him and get him out of the Crystal Cave. "Timedancer", of course, would be a different story, since the series is definitely over once Brooklyn gets back to Castle Wyvern, but since that won't be for forty years after his adventures begin, there's room enough for a lot of stories there).