I work in polymer clay due to my disability. Very sadly, I am unable to use standard clay as I don't have the muscle force to work it. Also as someone who is in the main housebound it's something that I can fire at home in the oven. It goes far, so is accessible to me in many ways. I also love taking this material that is usually used in craft and creating porcelain like sculptural work.
Polymer moulds to the heat of my hands, which I can then form fluidly. To make this material more sustainable, I reuse all the pieces to create larger installations in response to different subjects. They are stacked, interlocked and balanced on each other, they aren't attached in any way. I usually make a couple of new pieces for every new installation. I then dismantle and create the next one, reusing the old pieces. This is another material that I use automatically with no sketching or planning.
I remain on the look out for a material that will be even more sustainable whilst accessible to my physical needs.