All of the below photographs were taken outdoors at night bar one which was taken in an underground bath house in Istanbul. I took all but one while I was away travelling. Some were taken at sunset, others shortly afterwards and a couple during full dark. After experimenting I definitely prefer the ones where there is some light left in the sky.
I loved taking photos at this time of day. Even though it was a struggle trekking my tripod around 9 different countries it was definitely worthwhile.