Hi Andreas,
Good topic. I don't think that dreams in and of themselves are really all that important. Even dreams with holy people in them.
Over my lifetime, I have had many dreams of holy people and other spiritual things. Examples:
I once dreamed that I saw the Shroud of Turin in person (This has never happened. I've only seen pictures of it). It was Easter (on civil calendar), about twenty years ago...I woke up completely confused.
Another time,I dreamed that I was being chased by demons ....I was not exactly afraid of them, but in my dream I thought to myself, "This is a terrible dream. I'm going to wake up now." And I did.
Here's a couple more examples:
I sometimes have broken record dreams about Scripture. This is where I dream about certain passages that just repeat themselves over and over until I wake up. These are the ones that are hardest to understand.
I also once dreamed that I had a sort of meeting/introduction to St. John the Apostle. In that dream, I just felt very welcomed by him, and as though he liked me a lot but I couldn't figure out why, and so I asked him...I never heard the answer because I woke up.
Recently (very recently) I had a dream about St. Columba, who you know is my family saint. In the dream, I went "home" to Donegal and he was in the chapel yard of our family house, and he was petting the birds that have nested there. (Its a real mess in there!) Anyway, I asked him why he was there and he just stared at me....I woke up...no idea what it means if anything.
I think it is very telling that I have never,in all my life, dreamed about Jesus himself. If I did, I think I would fall out of bed, on my face and tremble. Truly.