While I can't speak for everyone, I think my favorite panel of Celebration V was the one that featured The Clone Wars voice actors discussing their roles and diving into some fun and familiar voices. The climax of the panel involved James Arnold Taylor (Obi-Wan, Plo Koon) displaying how a voice actor can shift between voices with similar characteristics. If you've yet to see or hear James do so, then the video below should be a treat. Note that Tom Kane (Yoda) has a pretty darn good Morgan Freeman impression as well. Enjoy!