I like the feel of the Chiaogoo Bamboo 9" circular needles. The wee knitting needles are so easy in my hands that I'm having a hard time putting the socks down. It's effortless knitting and very potato-chippy.
Seeing the Regia yarn self-pattern emerge is also enjoyable. I can tell these socks are not going to be identical socks but they look pretty close so far.