Yep I've been bored. Started over on this series. I know the popular opinion is that the show went downhill quickly after season 4. For the most part I agree. Having just finished season 6 (DDK) I can safely say that season was much, much worse than I remember.
To my surprise, however, was how I enjoyed season 5 the second time around. I remember hating that season when it aired. I would have loved for Dex to end up with Lumen instead of Hannah at the end. It would have made so much more sense. Yes, she was a highly annoying character for the first third of the season, but I believe she became my favorite Dexter bimbo.... much better than Lila, Hannah, the cashier in Nebraska (wtf was that about?) or maybe even Rita (who was a total nag before she left the show). The way Lumen left kinda pissed me off at the end.
Season 4 is still the best, imo. 3 and 6 are tied for worst.