I like my personality :) But It wasn't always. There were times when I felt really uncertain, but I overcame It after I accepted my personality with all my flaws. I think you can't move on until you don't love yourself. Now I look philosophical at my life. If I have some bad quality that I don't like I just work it out without any concerns. 

Yes, I am happy with my personality , thanks to Allah :) .. My friends say that I am very quiet and unpredictable, I am stubborn though. No one can tell me how to think and what to believe in. 

It is very important to be happy with your personality and to have a peace in your soul....it doesnt matter which personality you have, you must love yourself anyway as you are a part of this uniververse....universe is perfect so you must be perfect too))

yesss

It is very hard to say how to change but It is good to go back to your childhood and history. Some actions of losing meaning become a sear on my action. That can rebuild our character to what we really choose. It is like a novel the fifth Shierly become one Shirely only.

I dont know. I had ever read an abnormal psychology book. It seem that "dont like yourself" that is general cause of each sicknesses. Perhpas, You can not find it but you can look for a doctor without any bad meaning to help you.