I Dare, because it brings together so many characters and plot lines and! the redemption of Pat Rin. And (I think; I am in the process of re-reading) it has Ren Zel, who is one of my favorite non-main-characters. But it is very hard to choose. I love that Carpe Diem gives Miri and Val Con a chance to learn how to be married, and the part in Plan B where Shan and Val Con reunite, and so many things about every single one of your books.