No, it doesn't, except to the extent that lack of sleep can encourage irritability and prevent you from thinking clearly. When you are again well-rested, your personality will be intact. :) However, if you remember your dreams while you sleep, that can affect your waking life and be part of what you choose to integrate into your personality.
Nothing
yes u can change your personality
Yes, it is alaways possible to change your personality. You just have to figure out, what you want to change about your current personality, and figure out how you are going to do it.
1st. If he doesn't have personality whatever, that is just how he is. Would you want some one to change your personality.
Very difficult to change personality disorders.
Quantum personality change is "when someone drastically changes his or her personality within an extremely short period of time For example, if someone dramatically altered his or her personality within a day or less, it would be a quantum personality change." http://www.funnelbrain.com/c-1049-constitutes-quantum-personality-change.html
People can change the way they look at things, which might change how they see things and make them appear to have a different personality.
no
no
Sleeping involve some chemical reactions and physical phenomenons but I suppose that it is exaggerate to consider sleep as a chemical/physical change.
Quantum personality change is "when someone drastically changes his or her personality within an extremely short period of time For example, if someone dramatically altered his or her personality within a day or less, it would be a quantum personality change." http://www.funnelbrain.com/c-1049-constitutes-quantum-personality-change.html
No, not really. It will change some behavior but not their personality.