For me, I can't stand how hot it can get in Vietnam. I would love it even more if it wasn't always so hot out there. I just wish it was a bit chilly from time to time.
I'm kind of used to hot weather. I used to live in Texas, which is dry hot, but also lived in Florida for a few years and I'd argue that's worse. It was way too humid. Vietnam is like that in a way, but I got used to it.