My grandmother on my dad's side had many strokes during her life. Her first one was before I was born. My dad said it changed her personality some--she became more sweet and mellow, and her voice became high pitched and kind of squeeky. I remember she used to tell me how terrible that stroke was. She said that she felt like she was trapped in her body, and the only thing she could control was her tear ducts.
She eventually recovered from that stroke, and she didn't have any more while I was growing up, until I was about 14. Then she had a very massive one. It really destroyed a lot of brain tissue, and her personality became like a 5 year old. She became very scared of everything, and couldn't take care of herself any more, so she moved in with my family. It was very very hard on all of us, including her. She lost most of her speech, and she would cry a lot. It was especially hard on me, because I had become accustomed to visiting her every Saturday night, and going to church with her on Sunday mornings before the stroke. She was the best grandma you could imagine -- right out of a Norman Rockwell painting. I had visited her every Saturday like that for 10 or 12 years, almost without missing a Sunday. The change was very abrupt. For me, it was a lot like she had died (or at least who she was had died.) A few years later, she again had another stroke, and this time she didn't really wake up from it--it was like a coma. She remained in that state for a few weeks, and then again had another stroke and died from it.
It's really important to have your cholesterol checked regularly. I was surprised to find out that I actually need cholesterol lowering drugs at my age (early 30s). That goes to show that strokes don't usually just appear, and they can be prevented. In my grandmother's case, she probably started to develop a cholesterol problem around my age, but it was not treated. She had her first stroke in her late 40s or early 50s. Get regular checkups, and do what the doctors say!!