Empathy is key. Understand how you yourself are percieved by others. Try to fold space and... sorry heh wrong meeting. Just try to imagine you are somebody else reading the post that you are writing.. it may help you.

It's ok to note your instant first impression whether good or bad though.. at least I don't think that's wrong. But we who make the mod are humans too, and sometimes need both positive and negative feedback.. Not consistently negative. And when it IS negative, it need to be so in a constructive way.