IMO, Remus totally knocked Tonks up, and Andromeda held a wand to his throat and made them get married RIGHT THIS MINUTE, OR I SHALL CUT THEM OFF. Which is why it had to be a quick, small wedding.

Also, why was Teddy at the train station in the first place? Shouldn't he have been 19, and thusly OUT of Hogwarts?

I lol'ed when all the Slytherins bailed, actually. Clearly they have no redeeming qualities whatsoever!

And bringing in everyone's Patronus forms was awesome, and NEVILLE. Dude, I have so much love for Neville right now that no real man will ever overshadow him in my heart.

And Ron claiming it was him that was famous. I really love him in this book.