Next Drupal Ladder sprint: issue or learn sprint?

Real quick:

Should our next Drupal Ladder sprint be a learn sprint, or an issue sprint?

For the newcomers: a learn sprint is where we all work through lessons on DrupalLadder.org to learn something new. An issue sprint is where we get to work on core Drupal issue from drupal.org.

We had a few learn sprints and then a few issue sprints. I thought maybe another learn sprint would be a good idea, but wanted to hear other opinions. Post your opinion soon: this is taking place next Thursday at APCO, and I'd like to finalize it by this Tuesday evening.