Than the artist himself helps or hurts

[Annamain]

I want to address the topic, what and how an artist can help themselves - or hurt.
It is no secret that the opinions of artists and art dealers (sponsors, etc.) may be far different. That the artist considers it his right, the dealer can be a serious problem. And vice versa - the dealer can find something right, but here the artist is unable to implement it, and even often hurts himself - and selling products.
It could be personality traits, especially the work or self-presentation.
I would like this topic to collect opinions from both sides - and artists, and activists of the art market. Because we are different - but represent two sides of one process, let's sportnye and perspective issues here. This is exactly help you better negotiate, and may even make our cooperation more clean and efficient. Ultimately, we are all interested in it!