I hate to be a party pooper, but every so often I hear someone complain that the female voices all sound too similar.. though I never found a perfect example till now.
Shyvana's speechpatterns are so very, VERY close to Vayne's, but with a slight lilt similar to Cassiopeia.
In particular, her quotes "I smell fear" and "On wings of fury" always make my brain stutter for a moment, since it expects to hear "I smell black magicks" and "On wings of night." Hell, a couple of times I've accidentally tried to use Tumble just cause the sound triggered an "I am playing Vayne" response. XD
I was pleasantly surprised with Riven's voice- I'd expected her to sound very similar to Irelia, Leona or Sivir but got something quite different instead. So, I'm a bit sadfaced about Shyvana. You were doing so well!