The charity dinner is worth going to at least once, because you can meet people like Chris Metzen and Samwise Didier and actually talk with them a bit and get their autograph (just don't be a leech and take up too much of their time - other fans want to meet them, too). That said, it's $500 a head. Steep, these days.
The Con itself... well, it's not your traditional fan convention. You'll find only a handful of vendors, and everything is Blizzard-focused (naturally), rather than it being sort of an overall geek mecca. You can run into some real bro-gamers there, too. The panels are great, but typically you end up in a back, back row (unless you park yourself very early and get a closer seat, and then you're missing out on other con-stuff) and you end up watching most of it on an overhead screen. For years, people have been claiming entire rows of chairs for their friends by stringing crap across seats (they really should put a stop to this), making seating an issue.
The overall quality of the goodie bag has gone down in the past few years. The 'big thing' has always been pretty awesome, but the auxiliary items... eh. My first BlizzCon was 2008, and they gave you a whole load of little goodies in addition to the 'big thing.' It was a nice little treasure trove of stuff. In 2009 and 2010, the bags had less and less in them.
All in all, if you just want the news (which is the major thing for the Con), you can save yourself $100+ and get it at home via the stream.
This comment was edited on Apr 13, 2011, 08:05.