Due to the method that I use to critique, some people have taken great offense and there have even been threats towards me about things and people calling me a bad producer and such. If you can't take a critique then don't f**king ask for one.
The way I critique is quite simple. Being a perfectionist, I can pick up on faults very easily. I spend quite alot of the critique explaining where the faults are and offer advice on how to fix them. For example, I might receive an audition that lacks energy. I will then say to the person where the main energy should be, since there is always a centre point to the line, and how the energy should be [hyper, happy, angry, etc]. I concentrate more on faults than I do on good points.
Not saying that I don't touch on the good points at all. If I do enjoy something about their performance, such as the tone they used or how a line is delivered, then I will definetely mention it in hopes that the said person keeps it up in later auditions or works. I like to be as indepth as possible so as to allow people to improve and gain more work later on. I have worked with a number of people now and some of them had only just began when they started voicing for me and they have said that my critiques help them in developing and maintaining their skills. You'll always get those jerks who are all "omg u sux i hop u die" but those are the ones who need to grow-up [and learn how to form a proper sentence]. The way I see it, if everyone is always just pointing out good things or, god forbid, being all "omg ur supah awsm desu" then where are you going to improve? The person will think that everything they're doing is perfect and flawless and they'll never learn to develop their skills.