Is it me, or does anyone else think the Doctor Who episodes are getting a little boring?

I think that the new series with Catherine Tate is great and all, since it's back, with new episodes and everything but the last few episodes I thought weren't as good as past ones, such as the ones with Martha. I thought that they were a bit boring and they didn't have much of a plot anymore, and that the Doctor was becoming a bit boring too. (However Catherine is great, even if I think she doesn't really look the part)