I myself use cotton and I have used a bit of jute in my time both handle fairly well, I've considered getting some nylon rope in the future but I'm struggling to find a good place that sells it and I'm not sure how it performs I'm worried it'll slip and slide everywhere before I can get knotted. So that is my first question.
My second being what is the largest rope size you have in your collection? Now it's not a competition so don't start comparing sizes with each other