Ask HN: What do you want from a conference?

I'm hosting an upcoming conference (which I'll avoid promoting here) which is targeted at developers. We've put together what I believe is a pretty solid list of speakers all speaking on technical talks. I read Hacker News every day and watch many of the video presentations various developers make on coding and scaling apps. In the hopes that I can make an incredible event for developers, I'd like to ask the community what things you want out of a conference. Would you attend one? What were some of the best aspects of conferences you've attended in the past? What were your favorite conferences? How do you hear about them? I write a top 100 blog that's often submitted on this site, but rather than promoting the event I'd like to hear the community's thoughts on conferences. Thanks!