I have never had a dream interpreted.
However, a couple people have given me, as gifts, dream interpretation books. It's fun to look up meaning of dreams...IF I can remember them. I have written down a few the SECOND I wake up, otherwise they are forgotten. I HAVE had a couple dreams that repeat themselves now and then...about a yellow house in the country I would love to have because of the awesome inside halls that go on and on.
I've had dreams interrupted by the alarm clock, and I put it on snooze, and sometimes CONTINUE the dream until the alarm goes off again. I once heard a speech about dreams, and he said what I experience is "lucid dreaming."
All that being said, dreams totally fascinate me, and I would love the chance to have some interpreted. I DO believe there is meaning behind our dreams, so I guess, in answer to your question, I have to say, yes, I believe at least some dream interpretations are valid.
Thank you for this question...very interesting. Blessings, Sparklea :)