Meetup Topics?

Does anyone have any particular topics they would like to discuss or see a presentation on at an upcoming meetup? Meetups certainly don't have to have a designated topic, and even when they do we can talk about anything else people present want to discuss, too, but it's seemed like there might be some bigger, shared interests the deserve special treatment. If you have a specific subject you're interested in learning or talking about, go ahead and propose it.