system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Why is She hulk green all the time while regular hulk has two personalities?
gpt
The multiple personality thing has nothing to do with the Hulk powers.  Literally no one else that transforms into a Hulk has that issue.  Most have some personality changes, but not a completely different one.    


The two personalities are solely and completely a result of Bruce Banner's own mental issues.  The powers merely triggered a mental break, but they didn't actually create them.  


Jennifer does not have those issues.  She is a complete well ballanced person and thus able to stay in Hulk form as long as she likes while still being herself.