Habits can be corrected with time. My wife will always want the light off while I want it on because of my reading habit just to see where my books are and read at night and I am correcting that gradually and she now understand.
My dear some habits can break marriage especially when you don't have a partner that is friendly and understandable.
The best is when one identify the habit that he or she has and that will be battle with time.
Good luck
You're right, some habits if not well managed can destroy the person exhibiting it, also, the part of adjustment or change is very possible.
I appreciate your valuable comment.