I like to use socks made for cycling and also some that are made for hiking.

I do not like having my toes squished together and the DeFeet socks (my first pair of cycling socks) were just as roomy in the toe as my favorite lightweight Smartwool PhD hiking socks. So I use the wool in the winter and the others in the summer.

Sometimes I also use my Injini toe socks but I find that, although they are great for hiking, they tend to develop uncomfortable wrinkles after about 25 miles. So I don't use them any more.

I don't like cotton socks since my feet sweat a lot and the cotton just holds on to the sweat and then I get blisters from the soggy socks rubbing on my feet.