I have been quite a fan of Paul Thomas Anderson since this film originally came out. That being said, if you did not like his other films, this may not be to your liking either.
Unlike what most people may think about this film, it is not pornography. But it does examine characters in the context of the porn industry of the late 1970s, early 1980s. The characters are interesting and their stories allow you to see them as more than mere stars in Horner's productions.
A great soundtrack and the adorable Polly Anna-esque "Dirk Diggler" played by Mark Wahlberg make this movie entertaining and heart-wrenching.