Someday I may do an article (or a webpage) about this to illustrate my points with specific examples, but I think once Japan's postal service began its privatization process, the quality of its stamp designs started a significant decline and the number of issues, which was already high, really went into proliferation overdrive.
Even for the more traditional designs, it seems like someone on staff was merely given a copy of Photoshop and told to create stamps. In addition, there's an amazing amount of stamps issued with anime and other commercial characters. I'm afraid I lost interest in collecting new issues, and only passively accumulate used.
Perhaps Japan is a worst-case scenario. But Peter's comment above about the Netherlands makes me wonder if sales managers start seeing currency signs with new issues, and unfortunately were not aware of the fable of the goose that lays the golden eggs.
Sorry to sound like an old grump (but getting closer to that every day

), but I think the jury is still out as to whether or not privatization has a benign impact on philately.
-- Dave