As someone who isn't a big fan of streaming porn I download all of my stuff. I've been using a private invite only tracker for over 6 years now. It's perfect thanks to the massive amount of content and a robust tagging system. I realize it's not for everyone but it's gonna be my primary source as long as it exists. The only thing I don't get there is JAVs, but for that I have another site I've been frequenting for about as long.
I, too, prefer downloading. But I have so much going on these days I've been steaming more out of convenience. Setting up shop just makes it easier to... set up shop so I can better share content.