Though I myself haven't really seen many, parody films are an excellent way of taking many aspects of the film, and putting a humorous twist on it. Though nowadays, much of what was great about parody films has now been reduced to mere pop culture references. Certainly older ones had some references, but it wasn't always the main focus of humor, the focus of humor being how it acknowledge the strengths of the original source while playfully acknowledging its flaws.
So, I ask you, what were your favorite parody films? I myself really enjoyed Spaceballs and Austin Powers