Eating
I won't lie. Thanks to growing up eating chicken breasts (I used to find even drumsticks a bit icky), the thought of eating chicken feet made me queasy. But, buoyed by the desire to impress my tour group, I gave it a shot, and it wasn't that bad. Just rubbery and and salty.
This is just one example of the many ways Vietnam is less wasteful (and more creative) with cooking than Australia. Others include eating eel, fish guts, sea snail and pig's ears (neatly sliced in a salad, in case you were wondering).
On top of that, I found Vietnamese people eat less junk food. As our friendly guide Thành Vương told us, it's actually cheaper to buy local (fresh) produce from the wet market than it is to shop in the supermarket.
From my own experience I noticed that, even though I was on a Death By Food trip, feasting three times a day, because the food was so fresh and wholesome (rather than my diet of processed food and caffeine which I follow religiously back home) I felt better and healthier than ever.