I loved Vietnam, and all the food and culture that went with it. I did Hanoi-Hoi An-Hue, but I'm hoping to get back and go further south next time. Also interesting to learn about the tax on the width of the houses, I didn't know that. I'd wondered when we were there why they were all so narrow and tall, so now I have my answer.
So far I'm following almost the same route (I also spent a day at Danang). I too won't make it to the south. So many things to see... Yes, next time.