Hi Melody!
You ask two very good questions.
Your first question asks about preferences of tactile readers. One of the members of our Tactile Graphics committee is a very highly experienced tactile reader. This is what they have to say:
As a braille reader, my preference may vary regarding production method, depending on the type of diagram being reproduced. My first preference is graphics produced on a braille embosser, but enhanced with added collage elements, such as raised dots and added lines. I do think that microcapsule paper is good for preparing maps and some science diagrams.
Your second question asks about software and embossers for tactiles. We would like to refer you to the "Computer Aided Transcription" Ask an Expert forum with this question. They will have much broader experience across both braille production and tactiles production than we can offer here.
Hope this helps!