Last year I went to the 500px photowalk, an event that takes place in different cities in the world. I went to the one in Amsterdam, which was sponsored by Fuji but funny enough, I was the only one with a Fuji and not a Nikon and Canon. It often is the case everywhere I go though. This time, I was lucky that the ambassador of Fuji in the Netherlands was leading the walk and he taught me a few features I had no idea about.
1. Guidelines. Most cameras have 6 guidelines. Fuji has 24! It just helps you to measure better and train your eye. The ambassador says that he mostly has it turned on.
2. Double exposure. Some models of the X-serie of Fuji have the option to take double exposure pictures on the spot, without having to mount them on later. It has advantages and disadvantages of course but it can be a funny tool to play with.
3. Highlights. You can turn on a colorful indicator of the lighlights on and see where your whites are.
Good luck with your system camera :)