Not sure if this question is too broad, if it is please let me know, we could probably turn it into a wiki. I'm posting this as a reference for other users.
What would you say are the best security conferences to attend, and for what reasons? I know defcon is considered the most popular US con, but that doesn't make it necessarily the most viable. I'm not only looking for lists of cons, I'm also looking for posts that reflect personal experiences. For example, I'm attending th0tcon this year, which is a relatively underground Chicago con that will most likely have a lot of cutting edge exploits from industry experts (probably due to its anonymous vibe, the location hasn't even been announced yet). To sum, what cons would you recommend for what specific security areas and why?