I can guess that at some point in most people's lives they suffer from a lack of creative expression or self expression.
Like any condition, there are obvious symptoms: Job dissatisfaction, restlessness, lack of enthusiasm or motivation, indecisiveness, prone to imitate well known people or maybe having a mid-life crisis.
Any one of these symptoms can be contributed to other things but together they point to an internal battle.
A battle between their personality & dreams, against their career direction & other external factors.
I'm no Psychologist but there are things that makes every unique heart sing & things that don't.
Without a way to express yourself in a positive way, you can be suffering from a kind of emotional malnutrition. So feed your soul. Find the form of expression that suits you. You probably remember what that was.
For the 'being born creative' series (childhood creativity)
You can find Steve at www.ineedtocreate.com