You know, putting aside how many times I've seen these movies, I forgot just how many "good" murders there were.
I still remember my "first" impressions; the shock of the horse's head in Woltz bed

The tension and buildup before Michael kills Sollozo/McCluskey; Sonny's murder on the causeway was so gruesome for it's time. Yet, I went with Fanucci's murder. I just liked the way Vito pulled it off, calmly and quietly, with the festival music in the background as he disposes of the gun.
Yet, I agree with SC on Don Cicci's murder too. So quick and so cold. As a part of the audience viewing, you can't help but feel no sympathy for Cicci, and as a matter of fact say, "good" to yourself. Such a vicious way to kill someone.
TIS