I have so many, I'm sure I'll forget some:
1. Thomas Dekker as Littlefoot. For an 11 year old, this guy was remarkably good at conveying emotion, having a wide range of voice levels (from lower sounds to shouting), and an impressive singing voice. He's probably my favourite Littlefoot voice.
2. Anndi Mcafee. For me, the transfer from Candace Hudson to her seemed a little more seamless. it just seemed like me that, well, cera's growing up a bit, it's only natural her voice changes a bit. Plus, she has probably got the best singing voice in the whole series.
3. The flyer trio from Stone of Cold Fire. What's not to like?! It's a trio of flyers, voiced by D'artagnan, Winnie The Pooh and Pinky! Paulson and Cummings were impressive as always, but Michael York was something special, mainly because I think this first work in voice-acting, and he pulled it off well, almost like a less evil-sounding Tim Curry. Small wonder why Pterano has become such a popular character.
4. Jeff Bennet as Petrie. I always loved Petrie's voice. There was a reason he was my favourite character when I first watched the films. But one thing I noticed, as opposed to Cera anad Ducky who's voices deepen, his gets higher as the series progresses. It's like his voice unbreaks!