I'm going to miss my Arcane staff talking shit to me from time to time. I'm also going to miss that cool animation, when I'm close to a source of arcane power. I don't even care about that buff that much. I wish I could keep those 2 things even without the staff.
Also, I'm going to miss turning demons and undead to ash with my Ashbringer.
Most of all, I want to save Hati from destruction.
All those little things from Artifact weapons are what made them the most fun, at least for me. Please Blizz? Can we keep the little things?