I noticed personality changes in my husband years before his major stroke. An MRI revealed he had numerous past strokes and that explained a lot. Perhaps it is a very fine line between vascular damage caused by strokes and vascular changes. The personality changes I noticed were apathy, inability to make decisions, out of character irritability and an obsession to check things, also emotionalism following the major stroke, e.g., crying at election results!! It does depend on which part of the brain your partner had his stroke. My husband has had numerous "lacunar" strokes. On a positive front my husband continues to work to regain some fine motor control in his right hand and one week ago and 2 years after his stroke he actually managed to hold a pen and write something. The brain is amazing in its plasticity. I understand how difficult it can be that nobody but you sees the personality changes!