Sustainability of buildings depends on their usage as much as on their static, physical properties. One can improve on the latter by the effective employment of information technology. Sensing technology can provide real-time accurate context information, in turn enabling intelligent building management. In this view, people's needs, preferences, habits, and commands become central. The present work aims at defining the scope of and trends in the area of Energy Intelligent Buildings by stating ten relevant and timely questions, together with a brief discussion on each one of them. The questions are based on the experience on Energy Intelligent Buildings gained by the Distributed Systems group of the University of Groningen over a decade of funded research and development projects on the topic.