Vietnam is the timid cousin you never really spoke to during fam hangs™ (I'm coining it). She has soft features; is wide-eyed and naturally observant. You wonder if she is, to quote Jane Austen, plain.
Hong Kong was hot (June) and crowded (any time of the year). There were always too many things happening at every single time. There were always too many shops, too many tourists, too many stuff.