I'll vote on things that catch my eye straight away, i dont give preferance to all source chops and it also dont matter who the person is thats chopped it, i'll vote for newbies as much as established members.
I suppose i really dont like to see things that look as if they are floating when they are meant to be on the ground, i know sometimes its hard to get it wright but when its done badly it looks really bad.
Also i have a bit of a thing about over contrasty or over satuated colour in images, it just looks horrible.
I have a problem sometimes with thinking outside the box when it comes to thinking of ideas for a chop, so when someone comes up with an idea that does just that it will get my vote.
I also hardly ever vote on the first day and hardly ever use up all my 25 votes.