A great deal of importance is placed on finding your voice or developing your style and mostly I think, "Rightly so!". Originality carries a lot of weight. Yet, I also believe that we can work too hard on developing a "look". I prefer to just let it happen by virtue of making personal choices like color selection, favorite shapes and patterns, tonal choices, brush strokes, content matter and so on.
Trying too hard can make work seem contrived or formulaic. On the other hand, if a body of work lacks cohesion, it may also be criticized. Damned if you do and damned if you don't. But it's interesting to look back on the work of great artists and see how often they changed their style or media. I'd recommend Picasso as a good example of this.