I loved the first season of Walking Dead. The second season, not so much.
Not sure what went wrong between seasons (and yes, I know that Frank Darabont left the show after the first season, but I think there has to be more than that), but this season has been positively lethargic in its pacing compared to the first season. I think the zombies are moving faster than the average episode of Walking Dead Season Two; far too little actually happens in any given week, other than excessive amounts of talking.
The zombie budget seems to be suffering from cutbacks, too; most episodes have a single significant zombie scene, with a scattering of zombie appearances added to remind us that this is, after all, a show about survivors of a zombie apocalypse.
I don't dislike the series, but I don't feel like we're really going anywhere, either. Last year, I hated to see an episode end, knowing I'd have to wait a week to see what happened next. This season, there's just no energy to the series at all.
The mid-season finale is coming up next week; let's hope that when they return after a hiatus, they manage to get the series back on track.