You are mostly thought of as an optimistic person:
You are a person who is considered cheerful and optimistic most of the time. And indeed, you often struggle to keep that appearance and impression true. However, you may also have a tendency to fight depression. And during those times your apparent positive outlook is exhibited only after much inner struggle, even to an exaggerated degree of focussed intensity. It would do well for you to repeat, "If I just keep pushing, things are bound to get bettter!"