^Well to be fair...
-I've only watched the first 3 episodes of Hex before I decided to stop watching.
-I've only seen the 2nd Episode of the 2nd Series of Primeval, and didn't think about it again until I was thinking about this thread, so I've never bothered to watch more.
Also, I think my Torchwood Comment wasn't phrased very well.
You see, as I recall, the general perception of Torchwood Series 1 was that it was oversexed and then some. I still enjoyed the show, but I didn't really start caring about watching Torchwood until just after the beginning of Series 2.
Before, if I missed seeing it, I was like, "I'll get around to it later."
By series 2, I'd watch it before almost anything else in my queue. (Because I was hooked by the plot, characters, and general curiosity.)
That's really all I meant, I don't care about missing Demons or Primeval, because there's nothing (yet) that is drawing me in to watch either series. Nothing is hooking me into watching the show. (Other than the actors that is, in the cases of Phillip Glenister and Richard Wilson respectively.) I never found a hook with Hex either, but at least with Series 1 of Torchwood, I had the mystery of how Jack got back to the present and what he was up to, to tie it all together.
Maybe I just need an inkling of a larger/broader series arc to tie all the random elements together for me as I tend to like Serialized Narritive over One-off/Episodic plots from week to week.
Probably also the reason Sanctuary just got really interesting to me as well, due to the events of the Season finale.
(Forgive the above, if none of it makes much sense, I probably shouldn't be posting this late and hoping to be very coherent.)