User who's majority of rep (maybe 90% or so) is from up-votes on accepted answers. With a minimum rep of 10,000.
User who's majority of rep (maybe 90% or so) is from questions. With a minimum rep of 10,000.
User who commonly up-votes something that has very many down-votes or down-votes somthing with a lot of up-votes. (Basically disagrees with community)
User who down-votes all competing answers to the same question as himself.
Thats all I can think of for now, I may add more later.
What about badges you have to be nominated for? Like..
Above and Beyond
Must be nominated by 20 users for going above and beyond to help them.