Luke, Ben, and Vestara: while I liked their character developments and interactions, I was disappointed that they hadn't accomplished more when the book was done. Just a lot of traveling around looking for clues. On the other hand, I found myself liking Vestara a lot more since her budding romance with Ben was less emphasized than in previous books. Let a little more of her character come through without her seeming as much like a plot device. I also really like the way Allston writes Luke and Ben. You really get a sense of their relationship.
Callista: I am no fan of this character. The sooner she was eliminated entirely, the better. However, I did like the way it was done. Respectful, appropriate. But she's gone. Yay!
Allana: Gosh, was she handled better in this book! I was actually interested in and concerned about her plot arc. That's a first. Though I must complain about Tenal Ka's lack of real involvement in that story. Ah well. I still enjoyed it.
Han and Leia: This is the best they've been in awhile, in my opinion. Actually getting into the action at times instead of getting bogged down in more talky plots. Their dialogue really reminded me of their OT personalities, which is always a plus, in my book.
The Jedi coup: I loved it. Absolutely loved it. It was bold and forceful. Some people may dislike this, since it is a bit un-Jedi, but I was more than ready for it after how complacent the Council was during Jacen's rise to power. I also thought it was executed quite nicely. Glad to see a few of the Masters get a little more page time. Particularly loved Han's contributions.
Tahiri: Her page time was pretty small, when I looked back on it, but I really felt it made an impact. I had been torn over her trial. On the one hand, I felt she deserved the guilty verdict for murdering Pallaeon. On the other, I certainly didn't want her character put to death after all she's been through. So, I really liked where she was left at the end of the book.
Jaina and Jag: While I liked them alot, they were pretty irrelevant. Most disappointing. Jaina, as the last Solo "kid" alive, deserves more plot than she gets.
I also must comment on Boba Fett's appearance. Most of you know that I am not a huge Fett fan. I like him fine, but think he's overrated. That said, I was glad to see him. I'm looking forward to seeing what's in store there.
I think it was Mara who said that she thinks Wynn Dorvan is a character to watch, either here on the forums or in her review. I think she's absolutely right. I keep waiting for them to do something with him.
All in all, Conviction wasn't the best book in the series, but it was very enjoyable. I honestly was expecting someone to die toward the end there, but I'm glad they didn't.