I'm guessing we hear so much negativity about boxes because that's the predominant form towers tend to take and as such it's often a bit stale and predictable. Doubtless the box is an efficient shape and that feeds into the function/purpose thing, but at the same time buildings ought to have a modicum of inventiveness and distinction. No doubt, boxes can be extremely elegant. I'd just like to see more variety. Not necessarily the kind of variety you'd find in Dubai, mind you. It's a fine line.