HOW TO DEVELOP OR WHAT QUALIFIES YOUR ART STYLE

Because of my interest in oil painting in particular I have tried many methods over the years and finally came to a method of painting and only then I could see a sense of style coming out of my work. I thought of all the factors that influence style and made the following very simplistic list
1. Concentrate on a favorite medium.
2. Concentrate on a favorite theme.
3. Consistent execution - sameness of art pieces.
4. Favorite color palette.
5. Level of intellectual content and emotional intelligence is the same or slightly different.
6. Progression is in a clear and distinctive direction.
7. A favorite surface or some even has a favorite size.
8. External factors like extravagant framing or simplistic framing - ideally a painting style is separate from framing style.
9. Sameness of working methods ensures sameness of execution with regards to brushstrokes, binders, etc. etc.
10. Same source or reference material - working from a live model or in situ or "en plein air" is quite different than working in a studio with sketches and drawings made from source material.