I NEED THE BENZ!!
Serious answer:
Actually some Rockstar insight would be cool; the rise of the studio and how they tried to live up to the name might be fun, horrific, or both.
Kojima too of course.
Would love some more insight into Nintendo's R&D process. I feel like Nintendo is more willing than most to experiment with hardware, and though we've seen some of it, I'm sure there are some crazy fun abandoned projects we haven't yet heard about.
Personally, a full-on inside account of the Xbox One planning and launch would be of great interest. I still think there were some before-their-time ideas in that whole project, and I've no doubt many of the team were well-meaning - but I get the whiff of some corporate infection setting in over the decision-making process, and twisting the motivations and emphasis for certain features.