Julie I loved your comment! I feel the same way. It also made me meditate about what I mean by 'defines me' so I looked the word up in the dictionary. The closest definition was 'to make clear the outline or form of' such as 'the roof was boldly defined against the sky.' So, I think that I mean 'a work that makes it clear to me what kind of work I want to do'.
Does anyone have that experience? What was that work!