Well, my wife was 30 when I proposed, and even though I am a Yankee, they liked me. I really did not spend a ton of time with them, but they were happy I had a good job, good appearance, good manners, and they met some of my family, and everyone was nice. That made them happy. They could tell I loved my now wife.
If they could not tell how much I loved and cared for her, they could tell when my wife was very ill just 3 weeks before our wedding, and even slightly kind of tried to push me away saying I don't have to marry her, and was at the hospital with her for several weeks until she got better. They did not know what was wrong, but we really knew. My wife's mom and 3 aunts all have MS. My now wife was tested for everything, they really do not like diagnosing MS, they need to rule out a stroke, Lyme disease, many other things, all of which drove me crazy because I wanted to get started on the steroids she needed. At one point before the treatment she was slightly paralyzed, and could not walk.
Anyway, I kept my strength for her, and she was at home for 1 week and after the 2 weeks at the hospital and we got married as planned. Her parents think I am alright.