I'm using UnderArmour socks in my dry suit, and since I haven't found good hard boots that fit into my fins with my big feet, I've been using big wet boots over my drysuit feet. It's been working, so at this point, it "ain't broke" so I'm leaving it...
Hands? I used 7mm wet gloves until this summer, when I finally bent and got dry gloves (talked to a "published" New York based diver at Beneath the Sea last year and he said he didn't like dry gloves, he kept ripping them, so stayed with wet...I like the dry gloves, personally) Last time out, my dry glove plastic ring was broken, and I had to use the wet gloves for the dive (42º water top to bottom) and it wasn't pleasant...thank you SiTech for the awesome customer service in getting my replacement part to me with no hassle whatsoever! I'm hoping to get out this weekend (probably Sunday) so I'll be back to dry gloves...
All that said...besides the "ice cream headache" at the beginning of the dive, my head and face isn't too bad, and I end up with a numb face afterwards...not horrible...
During the dive, I tend to put MORE air into my dry suit than my wing for buoyancy...I wear unconventional undergarments (UnderArmour COLD gear base layer, a sweatshirt, and a cut off sweatshirt, along with a fleece sweat suit) I've been more than warm from a "core" standpoint, although I'm considering, spending the $$$$ and getting conventional drysuit undergarments...