I'm Kiritsu. I beta for anyone who would like me to.
I try to get things back to the author within a week, and will usually remember to let them know if something comes up that will change that. Should an author not get their fic or a note after a full week has passed, they should send me a pm or e-mail asking about their fic. It is very likely that life got in the way of things and I have either forgotten to send you your corrected fic, or have not managed to even get to it yet. In that case, I will get it back to you as soon as possible.
I will correct spelling and grammar, but I usually leave characterization to the author due to not knowing most fandoms that well.
Should there be anything, like entries in a character's journal/diary, that should not be corrected, I need to be told or else it will get corrected with everything else.
I will take whatever fandom is given to me. If I do not know the fandom, I will let the author know.
I do not claim to be perfect, and there is always the chance that I will miss something. I'm only human.
If I am unsure of something I will leave a note in the fic, usually in a different font or font color. This usually happens when I'm not sure what the author is trying to say, or there is more than one way to fix it.
I leave a note with what I thought of the fic either at the beginning or end of it.
I will not take a fic if the bulk of the story is written in anything but English. I do not know enough of any other language to beta in it. If a character speaks in a different language at times, it's ok, I'll just leave it alone.
The fandom I know best is Harry Potter. Followed, in no particular order, by Detective Conan/Case Closed, Star Wars, Rurouni Kenshin, Petshop of Horrors, YuGiOh(the original crew [Yugi and them], not the GX crew), Anita Blake, Sailor Moon, and...I'm probably forgetting some. Actually, I know I'm forgetting some, I just can't remember them to save my life right now. Will add later if I remember.