Without planning it, I ended up spending almost a month in Vietnam during this little trip o' mine. It could just be spending $60 on the visa made me determined (initially) to get the most out of it. And I'm (mostly) glad I did, although towards the end I could have sped things up a bit and headed on to Singapore sooner. I also could have shaved off nights in Ho Chi Minh City and Hoi An to make the whole trip a bit more compact.
Read MoreA colorful doorway in Hanoi, Vietnam