Why ask others does it work in your own family? Are you the same as your mother’s brother. My kids are nothing like my brother. As far as OTD is concerned, the best of the best families, the most chashuv of Rabbonim these days are going through the same nisyonos in this area as any other parents who are on different madreigas. Would you use the same formula for judging a girl if she was the daughter of a very chashuv family or Rav even if one of her brothers were currently OTD?
Personally I would say check into the girl and her parents to see who her role models are. Check into her friends to see the crowd she hangs with. That is more important.