The term is stroke survivor not victim.
The incidence of bizarre unpredictable behavior after traumatic brain damage is well-documented. As for becoming "more demanding" that too can result from brain damage.
These problems are not very common, of course and ordinarily, a stroke results in a tendency towards passivity.
A stroke that causes damage to the pituitary often causes severe personality changes because of the resultant hormonal imbalances.
depending on what side the stroke occured on and how severely it effected the brain - the person's personality can be effected.