Carl Jung says he has analysed more than 2.000 dreams per year, a very impressive number by anyone's standards. In his Dreams book, which a very good collection of many of his dreams experiments, he is after demolishing some Freudian's dreams concepts, mainly the one which asserts that the purpose of dreams is to fulfill infantile sexual wishes repressed in the unconscious, which don't find adequate outlet trough conscious activities.
To add content to this dispute, one has only to have in mind that Jung was a very ardent disciple of Freud in the beginning of his career, but the relationship turned sour after 1914 in the figthing for prestige at the foundation of the Psychanalisys in the beginning of the 20th century.
In Jung's view, dreams are not only wish fulfillers, but they are also compensatory vis-a-vis our daily conscious life. So, the purpose of them is to balance our conscious and unconscious life. So, if life is good, dreams are bad and vice-versa. At the end of his life, Jung said in one of his testimonials that by means of a very representative dream he closed a circle, which meant he got a balanced mental life between unconscious and consciousness.
Also, dreams should be taken not as isolated entities, but rather as a series of concatenated manifestations of the unconscious, something which could be represented by the ancient mandalas (Sanscrit for circle) of many peoples from the ancient world (mayas, hindus, polinesians, etc...), where the ultimate end is to attain a balance mind. Jung's theory of the unconscious is, in my opinion, pretty much more attractive than Freud's, specially in what it regards the timelessness of the unconscious and the unconscious collective.
Reading "Dreams" after reading Freud's "Interpretation of Dreams" is a magnificient experience and the winner is surely the reader, who gets the most of two of the most proeminent and polemical psychanalysts of all times.