What's your favorite sock yarn

I'm still here! I'm working on classes for February and trying to organize the studio with bins that I purchased for my yarn stash.

I did manage to cast on socks and am knitting in the evening. I'm having to use wool - not sure I'll like 100% wool socks but I'm pretty much out of sock yarn! Strange but true. And since there isn't a great selection for speciality yarns in this area (close by), I'll be buying online.

This opens up a whole new question...what's your favorite sock yarn? And why? And where are you finding it? Either post here or email me. Thanks! ;-D