robotics: control systems, control architectures, behaviors (coupling perception with action), active vision, visual servoing
visual perception: computer vision, pattern recognition, RGB-D, point clouds, object recognition, pose estimation, registration, Visual SLAM
artificial intelligence: machine learning, deep learning, visual question answering, memory-augmented neural networks, attention mechanisms, learning algorithms
programming: design patterns, frameworks, component systems, object-oriented design, templates (C++), DevOps (CI, autodoc, code quality)
books (mostly sci-fi), games (mostly console, but also I also enjoy board & card games)
travels
MOOCs (my ultimate source of all-kind of knowledge)