I'm extremely thorough and accurate, and having been employed as a copy editor in the past, I take the task very seriously. I am happy to correct grammar and usage errors, assist with sentence structure and to a certain extent, give pointers on plot and character development.
If you want to engage my services as a beta reader you should keep the following things in mind:
You should have at least run your story though a simple spelling and grammar check using your writing software. If this hasn't been done, I'll send it right back to you :)
I will not wrestle with problems that arise from you not having a basic grasp on proper writing and basic English skills, nor will I re-write your story for you. If I receive a story in this state, I will send it back to your for revision until it reaches a point where I can reasonably work with it.
My writing tool of choice is OpenOffice, and this is what I will use to mark-up and correct your story. I can accept stories in any format that OpenOffice can open, but if your story is not an .odt file, please send it to me with minimum formatting so it's not all screwed up when I open it. I suggest you have an editor capable of opening .odt files, as this is what you will get back from me.
Please do not ask me to speed beta something or beta it for you at the last minute unless I happen to really, really like you. If you have to think about it, then answer is probably no! ;)
Please be thick-skinned and serious about improving your writing as I will sink my teeth and claws into whatever you give me. I will not be overly harsh, but you will get unvarnished feedback and only genuine praise!
At the same time, I do not expect you to take any subjective suggestions I have to be directives or in any way written in stone. At the end of the day, it's YOUR story.