There's an interesting article in this week's Escapist about all the stuff that happens in and around E3 that is not just games on display.
I'll admit I'm not much of an E3 fan. I generally get tired of it after about 3 hours and I come away depressed either that all the games look better than whatever my current game is or that every game is yet another space marine fighting aliens. I generally go just to meet up with friends but after reading that article I think maybe next time I should follow Jason around although I doubt I could keep up. It certainly seems like there's lots of more interesting and useful things to do and people to meet at E3 than I'm used to