I think Pete is the most natural and has a great voice. He makes the podcast look easy - and I'm sure it's anything but.
Kevin is a great "storyteller." His reviews are so descriptive, you can really visualize what he's talking about.
John is hilarious, and is the "Roy" to Pete's "Walt." He definitly makes me LOL the most.
Kathy is the "pure" Disney fan, and represents the fan community best. It's fun to hear how much she enjoys the parks.
Teresa is the one I relate to most: honest, emotional, and a little kooky. She seems a little less exerienced with Disney parks history, and asks questions about things I'm curious to know, too.
Cory & Julie are like the King and Queen of the DIS to me. They also give great tips about activities for younger kids. I'm often impressed at Julie's ability to hold her own in a group of strong personalities. Corey is tech-guru, and has an artist's perspective of WDW.
I feel like I'm still "getting to know" Ryno, Oliver, and even Craig, but I'm sure as I catch up on the podcasts, I'll start to recognize their personalities, too. From what I've seen, they have a younger generation's view of things. I like how they bring comics, films, and other trendy topics to the DISUnplugged.
And of course, I'll always remember and miss Bob, Walter, Scott, Max, and JenniLynn. I miss hearing Will and Steve, too, but am happy to see they still contribute to the DIS from time to time.
In short, they all have good voices, they are all my "favorite" at different times, and the group is made up of so many different personalities and perspectives, I have yet to get tired of listening!