Everyone's got their own opinion.
Did I make a comment in this thread remarking as to why this series still exists? If not, consider this post that comment.
I don't get it, how long can you milk a series before it becomes a stale parody of itself?
I don't think the series has been "milked", nor do I think that it's a "stale parody of itself". The series is amazing and in most cases, it's unpredictable. Sure, you know that Jack's going to go against the book and what not, but in general, the series is still pretty exciting (or was up until season eight. I can't comment on the new one for obvious reasons!). Okay, Redemption was a let down, but I think that's because we're used to the real time aspect of the show. The acting was still phenomenal, though.
Sure, some seasons aren't as good as others, just as with any other TV show. That doesn't mean that the show has dropped in standards.