I love the creativity of other knitters.
The variety of patterns on Ravelry and the amazing scope of colors available in different weights of yarn, in different materials, indicates the fantastic range in tastes between knitters. I am constantly stumbling across profile pages with a selection of finished objects that I admire. Equally often, I find myself staring at a collection of projects that are entirely opposed to my own tastes. I enjoy this variety.
Especially when it creates humour. And for a perfect example, see http://yarnyuck.blogspot.com/.