The right license for the job [July 24, 2012, 9:47 a.m.]
It doesn't hurt to think a bit more deeply about what uses you want to permit and even encourage. Every creator has specific interests and levels of comfort with sharing work, so it's important to take that into account when making a license choice. One person's pro could be another person's con. Creative Commons has been collecting a wide variety of examples of people in music, education, and social justice, all using CC licensing for their work: http://thepowerofopen.org/.
Much as we love CC licenses, they are not appropriate for all situations. CC offers a handful of possibilities to consider before you decide on a license. http://wiki.creativecommons.org/FAQ#What_things_should_I_think_about_before_I_apply_a_Creative_Commons_license_to_my_work.3F
Exercise
First, decide what license you think you want to use. Then go to the Creative Commons license chooser and answer the questions. Did the license chooser choose the same license you chose? If they're the same, huzzah! If they're different, what do you think happened that led to the discrepancy? Which license do you prefer? Why?