I also think there is a distinctive line between what is your personality and what is your experience. Experience are memories, which can be used etc when necessary. Personality is the tool which uses memories etc.
In other and simplified words, the choice of action that you take in a given situation depends on A) personality and B) upbringing experiences moral etc.
A is part of yourself and unchangable
B is information that you can store and use, and is changable
Even more simple:
Personality is your harddrive. It can be a maxtor 400 gb or speedster 300gb etc, but you cannot change it. You are born with some type.
Experience, memories upbringing etc, is the data that is stored on your harddrive. It can and will change during your lifetime.