1. Do you carry fixed blades, folders, or both?
Both/either, depending on the circumstances. Love both. But if I'm in a situation where I'm carrying a neck knife actually around my neck, then I'll only have a bigger fixed blade with me either on my belt or on my pack. A lot of times I'll use the standard neck knives like the Izula or Becker BK-11 as my primary fixed blade belt knife; they're such a perfect size and are so sturdy.
2. What is the heaviest knife you will wear around your neck?
Izula/Becker BK-11.
3. What are the advantages of neck carry?
Easier to access when crouched, sitting, climbing, or in a kayak. Arms don't bump it when swinging while walking. Doesn't dig into your ribs. Easier to shed when you want to jump into water. And a lot of times, I find myself holding whatever I'm working on up mid-chest, so the knife is closer to that location. I will say though that neck carry can be really annoying too.
4. What type of cord do you prefer?
Large diameter Arteplas PET cord with the inner strands removed and a piece of regular 550 paracord threaded through.
5. Does your lanyard have an emergency release system?
Not yet, but it will. I used to poopoo the idea, then was doing some rock scrambling and got my lanyard hooked on a tree branch, so that proved to me it can happen. I'll probably thread a ball chain through the paracord.