To answer your question directly, I like the heavyweight smarwools, and I make sure they are not tight. I actually carry a second pair of socks and change into them when I get to the stand. If I have a really long hike, I actually carry my warm boots and hike in some lighter ones..
I assume you are asking becuse you have problems with cold feet. I'll throw some suggestions out and you can see if any of them are helpful.
Things that cause cold feet:
-Lack of insulation - It is easy to fix this. Just buy warmer boots or wear thicker socks. Most of the time, though, insulation is not the problem when people have chronically cold feet
-Wet feet (even slightly damp from sweating) - another easy fix for stand hunting. Wear things that wick moisture, and in my case I actually carry a second pair of socks to put on after I get to my stand (take the damp ones off, put fresh, dry socks on). Also, wearing things that are too warm can cause sweaty feet and you end up with cold feet. I have heard of some people that will even spray anti-perspirant on their feet to keep them from sweating. Last, and I can't stress this enough: AVOID COTTON SOCKS! Wool or wicking synthetics only!
-Lack of circulation - This can be harder to fix, depending on what is causing it. First things first, stop smoking and chewing since nicotine causes the blood vessels to constrict. Second, make sure your socks, boots and clothing are not tight. I even loosen my bootlaces if I am on stand for any period of time. Along with the extra socks, consider carrying your warm boots and wearing some lighter hiking shoes if you have a long, tough hike to get to your stands. I'll tell a story about a friend to illustrate what happens when things are too tight.... this friend always complained about cold feet. He kept buying warmer boots and wearing more socks, but still had cold feet. He wound up with some boots rated to -100 degrees and was wearing three pairs of wool socks inside them, and his feet were colder than ever. We finally convinced him to get a half size bigger boot and wear only one pair of socks and to loosen his laces when he got to the stand, and his problem miraculously went away!
-The rest of your body is cold - When your body starts to get cold, it directs circulation to the core, and away from the extremeties. So keeping your body warmer might make your feet warmer. Wear a good, warm head cover. I really like a neck gaiter or silk scarf to keep my little red neck warm. The biggest improvement I made was when I quit wearing cotton t-shirts and underwear. Nothing chills you faster than slightly damp underwear from sweating on the hike in. Get some synthetic undershirts and underwear!
Here's one I can answer too.
When I was 11 I froze my feet and almost lost them. Today to hunt or fish in 20-30 below, this is what I HAVE to do with these sweaty feet....
First layer is polypropoline with baking powder poured in. About 3 tablespoons full shoud do. then 2 layers of pure knitted wool socks, then felt pack boots with that wafer insole under the felts inside. And do not tie your boots on tight.