To add to the points made by previous responses, you can see for yourself the benefit of unencumbered files by ripping your own legally obtained Blu-ray movies. Once you have a DRM-free file on your hard drive, everything is better: there are no forced trailers, the movie loads nearly instantly (the standalone Blu-ray player I've used took about 5 minutes to load a disc), and seeking is practically instantaneous. You can even watch your legally obtained full-quality movies on non-HDCP-capable projectors and monitors.
For me, being able to avoid TV ads, forced movie ads, and ads on services like Pandora are some of the greatest advantages to piracy.
Furthermore, you know things like Bitrate before you download. On Netflix, you don't know how a movie has been compressed. Even 1080p movies can have noticeable quality differences depending on the method of compression. Using a private tracker, you can see the exact program and settings used before downloading.
