I like duck eggs better than chicken eggs. I have a mild allergy to chicken eggs - they smell like rotten eggs after being processed in my body - and duck eggs don't do that to me! They don't have that sulfur smell to them, either.
When I used to buy fresh eggs from a friend, she used to put duck eggs in my order regularly. I didn't know which was which, and didn't know there was much of a difference. I didn't eat them very often, though, because of the side effects. I didn't know that the duck eggs wouldn't bother me!
Normally I haven't cooked with the duck eggs. Right now they are hiding them from me - darn it!! But, I did use one in the cornbread the other night. Man, was it tasty!! I was surprised. Everyone noticed how good the corn bread was, and thought I had bought a new brand of mix from the store.
I haven't tried the goose eggs, yet, but since my gander is gone I guess we can eat some of those this year. I understand that they make the best homemade noodles ever.
As far as quail eggs - I even read once that they can help people with allergies. I can't prove it, and don't remember where I read it, but it was interesting. They are tiny, and I think they would make much better pickled eggs than those giant hens eggs they use!
DeAnna