I think I have a quite strong signature style. It would be made up of the following elements:
black
red lips
draped garments
touch of drama
sharp blond hair
minimalism
The development of my style was two fold. One, I gave myself permission to wear what I liked (all of the above) and Two, I then worked on refining it. So while I would say my style is not 'manufactured', it is definitely a reflection of who I am, it has also been considered and backed up with specific choices.