Photographers have no limit. There maybe ways in which you prefer to work ,but you shouldn’t always follow what your good at. Giving yourself a challenge or target will help you to widen in how you analyse artistic values. This is what makes your work known not just for how your work is published and looks in it’s final production but photography focuses on the processes the photographer took and how it varies according to set theme.
Good books to read to understand the history of photography is David Bate or Susan soetang on photography