Is there any part of your personality that you feel you need to improve? If so, which part and why?

I have a difficult time sharing with others what's on my mind. Instead of sharing, I just bottle it all up until enough is accumulated and it just explodes.
Its difficult not only to put my thoughts into words, but to also get to the point where I even attempt to share them.
This makes many things in life much more difficult than they need to be, and its something that I have been struggling to change for a very long time.