Of the factors that occasionally block my creativity, needing the approval of others is the one that bugs me the most.
I frequently reflect on how liberating it would be to not care at all about what others think of what I create. When I hear a musician ignore conventional harmonic guidelines, like Andy Summers does in his guitar solo on the Police song "Driven To Tears", I'm exhilarated by his bravery and demoralized by my own musical timidity. On more than one occasion, I have agonized about something I create for a blog. Often, I'll skip posting that day rather than risking disapproval.
If my wife reads this post, she will no doubt think a phantom has taken over today. Over our 34 years together, she has many times commented on how little I care what others think. And when it comes to my general appearance (grooming, clothes, etc.) and my lack of tact, her assessment is largely accurate. Perhaps it's time for a trade - i.e. begin seeking approval in those domains (saving my wife some embarrassment in the bargain) and shed my need for approval in the creative arena.