Song
then Anime
So far, I have yet to prejudge or select for creator alone. I do read the profile of the video though. If it says 'I spent like 5 minutes...or this was just for fun it's not very good' then I avoid it like the plague. Creator of a vid means nothing to me.
and other people's opinions...I don't even pay attention to those unless the amv looks ripped off
But I typically won't download anything using a song I hate unless I have been told it's a good download. I do see a lot of amvs this way (cable connection and all) but I do tend to get a lot of boring amvs.