I've read them all; even not-so-good Bujold is better than most other writers.
I still want more about Bel Thorne -- how it got involved with the mercenaries in the first place, for instance. And Tung, his back-story might be interesting too. I was thinking more of an immediate sequel to "Falling Free", which is after all quite a ways earlier than the "Bujoldverse" main timeline.
Ooh, yes, "Sergyar" would be good. Miles is fine, but I want more Aral & Cordelia!
And Ivan. He needs a book. Or how about Captain Negri? Or ... I've forgotten his name ... the pilot who can only fly obsolete ships?
I think it's a mark of just how good Bujold is as a writer that there are people who want to follow the other characters in her world because they're as real as most authors' main characters.
I want Timothy Zahn to do a sequel to "Spinneret", too. He left us with way too many questions.