As a musician, music comes from inside you. For me, I do not let ensembles or if I play with them or not to decide if I am a musician or not. Music comes from within and that drive to share. That said, if you mean you want to be a professional musician; unfortunately that means you must interact with other humans. And part of being respected as a musician is demonstrating you can “do the job”. Part of doing the job in a group is working with others. So, to do well in music one needs to build a reputation. When I looking for others to perform music with I would look towards some general characteristics. These include the obvious to have adequate mastery on your chosen mode (voice instrument), a willingness and commitment towards continual improvement, knowing the literature/rep/musicianship of the chosen genre, showing I can work with others, being reliable myself in my playing and how I handle myself, flexibility and adaptability, ability to play as part of group or step up to the lead, reflecting the mission and goals of the group, communication musically and otherwise. Basically, like it or not, one needs other players/people to be in a group, negotiate venues, be asked to do jobs. That said; there are a LOT of great musicians out and about. So one must act and perform in a manner that others want to interact. It does not work to think, “I play so great, I am so wonderful, I can do anything I want!” One also must be able to consider critical comments as to if they are valid and if it is something you might need to change. I would suggest that if several have said you are too wild, for example, consider what might give them that perception? If you are not wild, how can you convince others of that. But keep in mind, in the performing arts, one can be turned down and there IS no valid reason. This is why you have to trust in yourself. But if you are in a competitive market, there are a lot of musicians in Boston, you need to compete strongly against those other players. And it is not always about playing the music. So, if you want to be in music, you have to go into it knowing not everyone will like what you put out. However, at the same time, you have to put out what others want. I dunno, and I am not making judgements, but be careful you are of a mindset to be willing to do some of this. One HAS to be open to working with many different types of musicians/people to be successful in the performing arts. One has to have a strong sense of their artistic sense and be able to communicate that. And, to mention, some of these qualities that I have mentioned? If one is not doing some of these, despite how well one plays/sings, people might not see you as professional musician. So one has to strive to project that. And, guess what? Sometimes people don’t show up, or a situation seems ridiculous. Guess what? That is human situation and essentially in the performing arts. So yeah, do music. But realize there is more to it and develop that aspect so you are someone others WANT to play with. Where others see you as an asset. And if something does not work out? Look for the next thing and learn from the last experience. In short, music requires one to play well with the others.