I have had quite a few replies now, but more are welcome, thanks to everyone who has already participated.
I tried giving all the form objects descriptive names for accessibility, but I will add proper labels soon for people having still trouble with them. Alternatively you can PM your email address and i'll send a text based questionnaire if you prefer?
I may rephrase a couple of the questions to clear any ambiguity:
The screenreader questions are used to determine the most popular screenreaders used and how often users play non self voiced games.
cx2, There are a few RPG audio games, such as Kaze no regret a Japanese game released for the sega saturn, but as you have not played any you are correct to not check the boxes. 
The visualisation question was referring to abstract graphical visualisations. i.e. randomly generated graphics that change depending on game events. This question is mainly aimed at partially sighted, legally blind and sighted people, to see if they thought that it would improve the audio game experience over just a blank screen.
I may add a box so that other revevent information can be contributed, but you can also reply to this message if you want to add something. Thanks