Interesting question, there. Let's see.... Considering that I haven't had the chance to listen to the first 3 books at present, I have to start from Honor.
Honor: #6 The Red Brain. To me, Owen during the grendel onslaught is the pennicle of what a true hero is both capabile of and willing to do to save the lives of the weak and helpless.
Destiny: #2 Burning Bridges and #6 The Last Deathstalker. What can I say? Jack in #2 does what I think a lot of Americans would like to do some days: "Hang them all!" As for #6, call me melodramatic, but I love how everything comes together in this one. And how somethings start to fall apart.
Legacy: #6 The Better Part of Valor. Again, my love for melodrama. And set-ups. Plus, for me anyway, this was the most comical of the Legacy series.
Return: The Whole Bloody Series with the exception of #5, only because I haven't heard it yet.
And also: Any episode with Oz. I love an AI with a quirky sense of humor.
It is only when we have lost everything that we are free to do anything. --Tyler Durden