do you think it can have an impact

Wow. What an interesting thought! Unfortunately, I have no personal experiences to give you on this. Do you remember where you read about it? My first instinct wants to say that this is a far-fetched idea; however, science is amazing, and stranger things have certainly been discovered/theorized in the past. It seems like it could be possible. I feel like so many things have an impact on who you are as a person, though, that if this is true, maybe it's not true for every aspect of your personality. I certainly think genetics play a role in your personality. My dad tells me that I drive like his mom did when she was living. An old friend of mine told me I drive like my own mom. Genetics isn't exactly your blood type, but it has to do with your bloodline, so maybe... It is certainly something fascinating to ponder. I would love to read the article.

Sounds strange to me. I personally think inheritance of personality is more likely. After all we get the blood as well as everything else from our parents. I have never felt I share something more with other people with my blood type.