This isn't an article, but a presentation put together by venture capitalist Ryan Spoon and some colleagues (although Spoon guest-posted it at TechCrunch). It's great for developers and entrepreneurs, but I think it's just as good for app users and people who think and write about this stuff a lot.

We all have complaints about even our favorite apps, and this presentation is a great starting point for thinking about how better to express ourselves in the feedback we give devs.