I will mostly give GA to answers I agree with, but that is not because I think everyone should be like me, It’s just means that im kind of voting for it as “factual”.
For example, If you ask how to fix a certain computer problem, I will give GA’s to answers that i think have the best chance of fixing the problem. I don’t really give GA’s for the benefit of the person who answered the question, rather i give them for the benefit of who asked the question, like an arrow or some bread crums to help guide the person in doubt.
If i give someone a GA, there is a 60% to 70% chance or so that i agree. However, i will give GA’s for other reasons. such as: The answer looked like it was very well thought out, or a lot of effort had gone in to the answer. The answer was funny. The answer totally powned my point of view leaving me with no come back or counter argument, The answer contained a new and original and very interesting way of looking at the problem. The answer lead me to information that helped me learn something new.