It sounds like you're putting a lot of thought into it and doing a great job, but I think most people don't like to receive critiques unless the person has power over then. When I ran my ezine, most people took the criticism well, but every once in a while, someone would get very upset, when essentially, I was acting as their boss. Basically, some people cannot take criticism. I admit, I am one of them. It has to be delivered gently and then simmer overnight before it is received.

I think it needs a good balance of compliments to criticisms, but sometimes it's really hard to find something to compliment. I'm finding more and more that I don't review fanfiction because I can't get past reading the first couple pages. It's usually the schmoopy stuff that throws me off. The first time I see a schmoopy term of endearment among two men, I'm gone.