I have a hearing loss and need subtitles/captions to properly follow dialogue in TV/movies without having the volume unacceptably loud. As a sci-fi fan, this becomes especially true as it is much harder to guess what a word you didn't hear was when the word is made up.

Some of the Australian distributors of DVDs have a very annoying habit of releasing TV shows without subtitles, even when the original release had them. This leaves me the choice of spending money on a product that I would like but not be able to fully enjoy, or find it for download with readily available subtitles for free. As much as I'd like to support good (IMHO) television, I'd be much more inclined to support it being released in a format I enjoy.