My current favourite is crochet using 4 ply yarn. Although I do knit I don't enjoy it as much as crochet. I have to describe all my projects as not containing more than 1% cat hair since my cats do insist on 'helping' with every project.
Since most animal fibre makes me itch (with the exception of Cashmere!!) I concentrate on acrylic and plant based fibres. I also recycle old Cashmere sweaters from the charity shops. I use them as sewing fabric if a bit felted or unravel them for the yarn.