When I rate a quiz I try to judge it by what I think most people's knowledge is. A quiz that lists 10 extremely technical questions with 4 obscure answers would be judged by me as poor along with one that is too easy. I want to learn something from a quiz. A question that will ask what is the rear frontal cell of the cross platapus ear lobe and gives a answer of cellular partical obscurity (made up question, of course) is poor since who would ever remember or want to remember the answer. What is your opinion?

BTW: How many digits are there in the answer to how many grains of sand will fit into the known universe?

I think you've covered one or two of the official elements you would judge a quiz for. If it is that left field it won't appeal to many people so few would rate it highly. Otherwise you've got obscure but fascinating facts, which I always give a good mark to, multiple choices which aren't that easy to guess and interesting background in the answers. You can usually tell when a quiz is a cut above the rest overall and warrants a 5.

I've given many quizzes a 4 or 5 when I only answer 2 correct since I am learning something. But if the answers are so obscure and technical that there is no way I would remember them they get a 1 or 2.

That's why we all get a chance to rate them. We all have different opinions. I don't judge on weather someone else will find it interesting, it is based on my interest. If the majority is interested then whatever I rate it will be overridden.

I know I can give some examples. Let's say I am interested in quizzes on dogs.

One quiz can be difficult because it's got genuinely difficult but interesting questions, such as "Once the darling of both gamekeepers and the English aristocracy, this handsome breed is now quite rare. However, it is as versatile as ever- no other sporting breed comes close to it in the number of titles earned per dog." with the choices of Nova Scotia duck tolling retriever, flat-coated retriever, Chesapeake bay retriever and curly-coated retriever.

The next quiz could be difficult because it has questions like "What is the average weight of a female Great Dane?" with the choices of 100, 110, 120 and 130 pounds.

I know that I would rate a quiz with questions like the first quite well, and questions like the second quite poorly.