In as much as you can be aware of what changes may occur and prepare for them, they may take you less by surprise, and let you have more control over your involvement in them. In addition to your skills your work values are important. These values incorporate the components which you seek in a job which are of greatest importance to gaining satisfaction from your work. These values are different for each individual and can include factors such as contributing to society, being admired and respected, making a lot of money, flexible hours, etc. They are non-specific in that they wouldn't necessarily be included in a job description, but would be factors you would look for in whatever job you choose.
Some people tend to be painfully aware of their weaknesses.
We have been taught not to brag. The better we do something, the easier it is for us to accomplish, and therefore the less value it has. Our attention is focused instead on what we're struggling with, working hard at, or failing to do. This may be a good measure of your self-awareness. This ability can often increase self esteem and expand your self awareness.