I strongly want neg rep to return, it was a quick and useful way to show disapproval of a bad and/or unhelpful post. The so-called neg rep bullying only affected a minuscule number of posters and the opposite effect can be argued for just having pos rep: that excessive amounts of brown-nosing and rep fishing have taken over.
I don't agree with the justification that removing neg rep was that so that one could articulate a response against a post they found unhelpful. The truth is that it would be extremely tedious and very impractical to have to reply to every single post you disagreed with, what's wrong with giving a quick negative rating? I also see no evidence that removing it has actually encouraged people to speak out against these posts more. It's just created the effect where horrible posts can only be pos repped, giving the impression to others, and especially to newer members, that they are actually helpful when their neg rep score would have probably far outnumbered the positive rating. I see it quite frankly as ludicrous that we're being treated like toddlers who can't bear to have negative criticism levelled against us.
In short, it's hugely pointless to just have pos rep, either bring back negs or get rid of rep altogether.