I'm in Indy's boat. I have lots of cute socks (synthetic), but I am wearing more wool all year round. I wear SW or 6 Point wool cycling socks in various lenghts, mostly mini and micro, but I do have some crew length. I also love DeFeet Woolie Bullies for my heaviest socks. Thin, but thick at the same time. Been trying to wear more synthetic now that it's clearly summer weather, but I have awful issues with my feet burning after about 30 miles, especially in my mountain shoes. The wool seems to prevent it. Guess I'll be buying some more wool socks.
I wear Tekko socks for the gym and/or walking/running.