He is definitely not obsessive. His four big areas of interest are books, trains, tools and his kitchen/cooking stuff. He tends to focus on one for a while and then revert back to one of the others. I would not say these are the only things he enjoys though. He also really likes cars, trucks, and other things that go; he loves to climb and swing at the park; he enjoys doing puzzles; taking care of his babies; etc. He seems to be a pretty well rounded kid thus far. He has also displayed good social skills. He is fairly sensitive when it comes to his emotions and coping, but I tend to think that has more to do with him being two than anything else.