I always feel there are several important carvats to throw out whenever you are talking about Freud. First, the society he was a part of was enormously repressed, especially sexually. Second, he mostly treated people with hysteria and things that genuniely had to do with sexual repression (men with the "glove syndrome" where they couldn't feel their hand below the glove line because they were trying to suppress a sexual urge to rub one off, for example). Therefore, Freud's pool of research is horribly skewed. Third, looking at any pysch theory you want to see both if there's a lot written about it (indicating it is considered a valid idea to investigate by peers) and if the theory holds up in real life tests and case studies. Freud does have a ton of people researching his views, but his theories are mostly debunked (not all, though the antigone/oepdieus complex is).

Still, he's pretty important to pop culture; his ideas have been infused in all sorts of literature and music etc. He's also important because his ideas spawned a lot of good other houses of thinking.