Well, the main problem I had with "clicky" in D1 was that holding down the left mouse button on a monster only attacked once. No other Diablo style RPG I've played has had that happen to me.

Harbinger is definitely clicky, but at least I can hold down the shift key and the left mouse button to keep attacking while standing in one spot (as long as standing in one spot is safe, frequently isn't)

Definitely neither D1, D2, or Harbinger can compare to <img src="/ubbthreads/images/graemlins/div.gif" alt="" /> though.