Okay, I'm going to have to check out some of these! The only one I've read is Six Dinner Sid...and it is a favorite in our house! Love that book! Okay, I'm going to have to say that I absolutely loved the ending. lol It's a spoiler, so if you don't want to know, don't read.
So, my favorite thing about this book is that in the end, the book emphasizes that even though his old set of families said he had to change, his new set of families all talked to each other, so Sid can be Sid, and "because everyone knows...no one minds." Isn't this what so many people here stress? The importance of open communication, and not needing to sneak around to be yourself?