I think vivd dreams are a genetic trait..
I think you're right about that. My dad always dreams of family & friends who have passed on, and so do I. I like dreams like this because it makes me feel that they're still with us. Years ago my brother in law passed away. Although everyone said it was from a drug overdose, I honestly believed it was from Aids due to drug use. He really looked bad the year before he died and although eveyone tried to get him help, he refused it. It had his whole family in an uproar. Anyway, about 6 months after he passed away, I dreamt of him and noticed how wonderful he looked. He was so happy with a big smile on his face. In the dream I asked him what he was doing here since I knew that he had died. He just looked at me and smiled and said, "Im alright now, just tell everyone that I am okay now."
Another time I dreamt of my late Grandfather. He knocked at my door and I was shocked when I answered it because I knew that he had died. He just looked at me and said "please pray for me." Well I did just that and haven't dreamt of him since so Im hoping that he is okay.
I've never dreamed of Dark Shadows though and not all that sure that I want to either. With my luck, I'd probably get something similar to that dream curse.