I like what Al said over here:
Some completely made up example
* How can I stop certain apps from starting automatically? Should I?
* How can I export my contacts to a CSV file?
* How can I get my Calendar app to start the week on a Monday?
* How can I send a single SMS message to multiple recipients?
* How do I root my Android device? Why would I want to?
I guess the key here is if you can't
phrase it as "How can/do I do X on my
device (in this app)?" it's suspect.
So basically, don't ask "What's the best music player" (very subjective) but "How can I play gapless music" instead. The former is way too subjective and differs on opinion whereas we can actually answer the latter question.