Your Life May Have No Purpose, But That's Not A Bad Thing Some interesting points for sure, I like the idea of being free when you don't have a clear purpose in life.
I've defined my purpose in life to be the best man I can be, in every aspect of it. This allows me a certain freedom to work on all areas of my life equally rather than saying, "I am going to be a fireman" or "I am going to be musician".
I do however feel that having a goal such as the above mentioned can provide great level of happiness. Many 'successful' people dedicate their whole lives to a certain career, they go through tragic times with no money, no hope and then build their way up to the top through pure perseverance and commitment. I would predict that this could lead to other aspects of their lives such as relationships, spiritual development and real core contentment can get left behind.
I don't buy into the rubbish of "I was put on this earth to do this certain thing", you either fall into a career path and go with it or you make a conscience decision to start something and stick with it till it work and it feels like you're doing the right thing so you believe you were born to do it.
Perhaps that's me justifying the fact that I am not at the top of any profession and don't have a clear idea of who I am in a working sense, who knows...