What the heck is hygge you ask? Well I've spent my fair share of time in Scandinavia and can tell you that it is not a trend over there. It's simply the way you tell someone it's nice to meet them, or to have a nice time when they go on their ski trip. It's getting together with friends on a cold, dark night in fall/winter/spring and drinking wine with a fire in the stove and woolen everything on your body. It's the feeling of Christmas except not just that time of year, with candles burning and sheepskin on chairs outside and wrapping oneself in a fleece blanket in that chair while you have a beer by the brygge, or waterfront, and eat prawns on white bread with mayo and fresh dill (my favorite.)
The American/British version of this is fairly similar; it's just drawing attention to the word or action instead of simply partaking in it.
That said, there is not much out there that is nicer than hygge.