A3: I currently hoard any materials I think could be used for my houseplants plants. I get my houseplants for free from people giving cuttings or seeds away. Sometimes they don't come with proper basins. So I save every cottage cheese and yogurt container, many take out containers and toilet paper rolls, coffee cups and lids, etc. I never know what else I could cleverly reimagine and build them into! I have one area I keep this all in, but once I have too much of an item I know I have to back off haha
I used to hoard more things but I had to move in the past year and lots of those miscellaneous "strings I might one day have a use for" did not make it on the journey
I also have quite a miscellany of things for embedded circuits and what not
