What Makes a Good Sunset?

I was looking out of my window last night and was amazed at the sunset that I saw over Cardiff, probably in celebration of Europe winning the Ryder Cup.  It is not often that you get to see such a fabulous sunset in the UK, whereas in Africa the sunsets are pretty spectacular and much more frequent.

African sunsets are memorable. This is probably because we often see them whilst over looking watering holes, with the sound of the wildlife in the background and with the taste of a sun downer on our lips.  And this is probably after an incredible day of watching wildlife and experiencing the local culture.  All truly romantic and breath taking. 

But what does make a good sunset?  Is it the colour? The vividness of it? Or is it the location?  What ever it is to you, I find that sunsets are personal experiences.  My favourite one was at Sossusvlei in Namibia when there had been a sand storm and the dust in the air made these flashes of red across the sky.  Truly remarkable.