Media Accessibility.
I like pretty much any type of audiovisual translation, but the most satifying projects I have worked on all had to do with media accesibility for eg. blind, deaf or the hearing impaired. Why is it that audiodescription is not yet one of the major topics along with the classic subtitling, dubbing, etc.? I would love to do audiodescriptions on a regular basis but clients often don't even know it exists. Therefore they don't know they want it for their projects. :)