I only download, and I want the best possible quality. Always download the maximum bitrate, 100, 144 GB files.... And I am not rich. In my country for 50 euros a month you have 300 Mbps connection with no download limits. And hard drives of several TB are not too expensive.
But I'm not a hoarder either. I only watch (download) around 10 or 12 movies a week at SLR. And I don't store all of them.
So I vote to keep the 100+ GB files with max bitrate.