Bask in the beauty of these skills and their variations thanks to the runestone system.
  Diablo 3 runestone page.
I couldn't stop smiling at how awesome the skills look and sound.  It's the little details that make the skills awesome.

Thanks so much for the thread; otherwise I wouldn't have found out about this sooner.
 
A lot of people I know who are interested in Diablo III have no idea how this essential gameplay system works much to my chagrin. This should help!
 
Really digging the more skill-transforming rune effects: Volcano whirlwind, fiery sweeping wind, the shield of frost (why would the skill be called ray of frost with that), raining grenades, acid vomit rather than rain
I  must say the Demon Hunter's skills are looking more and more badass. That Cluster arrow attack looks crazy.