I'm going to try something new here. I got an idea after observing Space Exploration and Astronomy. Topics of the week often are really good way of getting out a lot of interesting questions when there are enough visitors to the site in the week to see the topic and respond. The problem with Astronomy is that a lot of people don't know about the topics of the week because they didn't come up until after the visitor count dropped.
So here's my new idea:
Private beta is too early to actually start doing the Topic of the Week activity, but it isn't too soon to start coming up with ideas of topics we can do when we do start. My thought is that if we come up with topics now, people will look forward to their topic coming up in the Topic of the Week later on and will check back on this site later. It may help get a little more visitors later on when the beta experiences the infamous lag period.
With that in mind, what are your topic ideas?
(Remember that topics of the week are usually expressed in the form of tags--existing or not.)
UPDATE 1/13/2014: Aviation, now that you are in public beta and seem to be going strong, do you think you are ready to start a topic of the week? If so, make a new post to start up the topic of the week schedule. Need ideas for format? Check out Space Exploration and Astronomy Topics of the Week.