Tbh the paper I use the most are post it notes, I like to do easy origamis while taking breaks from studying. During finals my desk is always cluttered with post it animals and shapes lol
This stuff(pic related) is my most used as far anything that requires any larger paper with colors. It arrives perfectly square and it's cheap. There is better paper I've used, but it's usually for special models. I think my favorite so far is shadowfold. It's thin and easy to use.
I've always admired people who can do these things. It's impressive dexterity and a performance just watching it and the results can be so beautiful and tacticle too. Crazy the talent I can see browsing this board. Making me consider trying it so it's interesting to see what papers people are using.