I have transcribed depositions before. One of the reasons that I was not very productive was the fact that I would become interested in the actual context and back story instead of just typing the words in as quickly as possible. The main reason that I would never choose transcription as a vocation is the fact that I just don’t type very fast. I would encourage any fast typists who would prefer to work at home to look into transcription. Most of the time the content is boring enough that you won’t become over engaged, although we all tend to have emotional responses when we listen to someone lie.
The largest source of work by a wide margin is health care. Most employers prefer to hire trained and certified medical transcriptionists.
Legal transcription is a pretty big business as well. Licensed court reporters outsource a lot of verbatim transcription that they review and edit themselves before submitting certified documents. General transcription can include creating transcripts of television and radio shows, typing authors notes and even creating transcripts of podcasts.