I am really enjoying half updos lately! I think it is because I find them so easy to do and the results are often nice!
The Duchess of Cambridge often wears them, probably because you don’t have to brush it out of your face continually. Her half-up twist also lends a degree of formal elegance to her locks that’s way above a ponytail holder or some bobby pins, yet isn’t so complex that it takes too long, or seems overly fussy. The one in the picture below looks quite uncomplicated to replicate at home (or by a hairdresser).