I love knitting and I try to do it as much as possible. My grandmother taught it to me, and I assume her mother taught it to her, so it feels good to have a traditional link like that.
I also like that knitting and felting are two of the most environmentally friendly textile making processes as long as you choose the right kind of wool.
Merino and llama wool are particularly nice, and there are quite a few organic and natural options.
People are starting to realize that wool can hold its own against synthetic fibers.
It may be slightly more difficult to care for, but in terms of warmth and longevity it is second to none in the textile industry.