Unless its that Fringe manages to make sense (within its own premise) and doesn't dick around with the viewers to quite the same extent.

This!

Once we'd found out about Peter, the storyline isn't actually all that difficult. It's complex, but explained and as logical as it can be, given it defies logic. And I *care* about the characters and what happens to all of them, which I no longer do with DW.

What bugs me with DW now is that it's neither complex nor explained. It's complicated and leaves us hanging until some final unforeseen twist that explains everything that happened. Very much along the lines of "with a single bound he was free" without any proper framework for it to happen. Yes, Rusty did it a bit, but not as much as this. It's getting tedious, which is enough to make me not bothered.

Both Ugly Betty and Glee were like that for me. After starting well, they didn't continue to bring enough of what I liked to keep me interested. Same with Flashforward - after the mid season break, I just lost interest.