I've always loved meat, especially steak and chicken and always hated fish. Even now I have to get the fish down as fast as I can cos I don't like the taste.
Dairy on the other hand I've always loved, milk, yoghurt, cheese (except blue cheeses) and never had any problem with.
My dad has always has a fairly good diet for his blood type (A) but that I believe was largely down to his upbringing, his family were farmers and grew a lot of vegetables, they had a diet high in veg with little meat or fish.
My mum (type B) came from a more affluent family and they ate meat regularly (well maybe not just after the war when everything was on ration) growing up my mother had much more meat in her diet than my dad.
My brother and I grew up on a predominantly type B diet provided by my mother, whenever my dad did cook for us he rarely cooked meat.
In my family I was the only one ever to get fat. When we lived in Portugal we ate a lot of fish as it was more available and cheaper (we lived on a boat and often caught our own fish) during this time I was lean and energetic. When we arrived in Gibraltar and my mum started buying meat again I got fat. All my life it seems I've had to fight to keep the weight off while the rest of my nuclear family stayed slim. As a boy my mother hounded me to be more active as she saw that as being the only reason I was fat even though I was no less active than my brother.