Kirkland Signature Men's Outdoor trail sock, made from Merino wool. I wear them year round, incredibly comfortable and keep my feet dry.
http://www.amazon.com/Kirkland-Signature-Outdoor-Trail-Merino/dp/B00LFLOUI6
You can get them cheaper at Costco, I think a 4 pack cost around $12
How thick are these Kirkland signature wool socks? Also are they crew or calf socks?
For sneakers, Ninja Sox no-shows or Darn Tough "no shows".
For dress, Orvis Extra Invincible merino wool socks (Darn Tough).
For winter, Kirkland Outdoor Trail merino wool socks.
I have some smartwool socks and I find them great but to be honest I prefer kirkland socks for hiking (preferred them when completing MTQ1) http://www.amazon.com/Kirkland-Signature-Outdoor-Trail-Merino/dp/B00LFLOUI6