I knitted my first pair of socks last week in Simple Stripes from KnitPicks and I love them! They are my new favorite sock and I have worn them in shoes. I even told DH that they were the best fitting sock I'd ever had, and he looked a little amused, and asked if I wasn't a little biased since they were my first pair of socks. LOL
I'm knitting my second pair of socks (ankle socks) in Sockotta (45% cotton, 40% wool and 15% nylon) and it's nice too, but I still think I like the warmth of Simple Stripes, but the ankle socks are for warmer weather, so I may end up liking this yarn better this summer.
Those are the only ones I've tried so far.