Your perceptions are precise, I have to say, at least from your descriptions. Now I know a bit of why you don't like plastic. However, in China, the main reason for people like plastic might be its high price performance and its durability (compared with some weak materials). Bcoz natural materials, in my country, are much much much more expensive than it should be. I don't really understand, but people just cannot afford it for every single thing to be that material.For me, I have always been very sensitive with touch. I can feel the individual fibres in cloth. Nylon fibres are very harsh and sharp edged where as natural fibres are a lot softer and more rounded. In Australia we get a lot of cheap clothing from China that is also made of bamboo fibre, I like that, so soft to touch.
Also, I live in a hot climate, natural fibres absorb the sweat and carry it away from your skin, nylon traps the sweat against your skin and makes you hot and itchy. Nylon also creates a lot of static electricity and the material clings to your skin, very uncomfortable.
That is where my main aversion to plastics comes from but it carries through to the rest of my world. I also can't stand furniture with nylon coverings, the chair I spend most of my time in is leather. My sheets and bed linen are actually Linen, cotton. The thick quilt I cover myself with to sleep is synthetic fibre as it's warmer and more practical but there's two layers of cotton covering the outside of it.
I also don't like the feel of plastic cups and plates, mine are all glass or ceramic. Plastic also absorbs food particles and smells, materials like glass and ceramic do not.
Btw, you are from Australia! That's why you say your country have a lot of animals XD I like Australia. My friends tell me the lives there are slow and pressureless...