Dreams - an adventure or a misadventure

Dreams are the manifestations of our unconscious self. The things that we think during a day or things that affect us mostly come to our unconscious and we see them as dreams. But if dreams are the representations of our thoughts then why do we not get all-pleasant dreams? what is the cause behind it. why most of our dreams are not pleasant? Mostly through out the day we live in a self-woven stress. There are fears of the unseen future and the nightmares of our past sins which we try avoid confrontations. These all accumulate in the dreams and come to us when we are sleeping. Why do we remember some and some we don't and some which keep coming again and again. Is there a complete world of mysteries lie in our dreams. Lands of fables and mysteries come alive as we sleep...we don't pay attention but there is a world that is awaiting for us to explore. This world can be an Utopia or an Erewhon, a heaven or a hell or a heavenish hell or a hellish heaven. this world is a connection between our outer self and our deeper and purer souls...if only we could find a way to revisit the dreams we could know the real adventure. so many people have analyzed dreams and one of the most important is Sigmund Freud and the most controversial also...well i am half though the book...let me complete to write more on this...