In my experience style tends to be a mark of workflow in personal art. If you are looking at a specific style of a game on the other hand, it is often a conscious choice that adds recognizability and identity to the game. It'll be more memorable and people will immediately know from a single picture which game it belongs to. This style too is createad most easily by having a defined workflow on it, but style can also be added with conscious comparison to the style while making something with your own workflow.
What makes a style look the way it does? Arachne's dithering, Helm's construction on a technical basis? It leaves recognizable marks, but when drawing something yourself, you can maintain that style by copying the resulting elements of the workflow that create or define the style.
To reach an own style is something I too saw oftenly discussed and never understood. Doing art alot makes you work in a specific direction because it's most easy for you. If you wish to communicate a message, why try out new stuff if you can do it the way you do and it looks good? Even within that style, or workflow, you can improve your art quality, so why worry about trying different methods? If you are still developing, you're often having a scattershot at methods and aren't consistenti n them because you are looking for a way to have your art look better. Although this partially is workflow, most of it will come through experience and practice of art. Therefore, if you try and maintain alot of workflows, or copy alot, you can in fact have multiple styles that you can apply to your knowledge of art.
Just my subjective 2 cents
