Don't speak what I assume to be Klingon,

Nor do I, but an online dictionary assures me that the phrase is a powerful insult, translated as, "Your mother has a smooth forehead."

I agree that spin-offs in general are rarely a patch on the original, but what interests me about NG is its origin. I reads somewhere that NG was Roddenberry's own creation, and was his attempt to recapture the intent of the original series. I stress that I am only regurgitating here, but according to the article Roddenberry felt that his ideals for the show, both in terms of its ensemble nature, and overall philosophy, had been hijacked by Shatner, and that it was this usurpation which led him to try again with NG.
On the subject of successful spin-offs the best example that I can think of is Frasier, or does that pit Wgtn vs. HB again?