the drivers choice 
Excellent decision...
Let me guess...you sat down, looked at the pedals and lever, then remembered you are blessed with two working arms and legs? 

and realised that some things are better left to a human being to decide rather than a computer!
All of the above

plus I found myself getting bored with flicking paddles and increasingly leaving it in Drive - eventually I could see myself leaving it there almost all of the time. Okay if you've grown up playing Gran Turismo I suppose.
I suspect that DSG-type technologies and the comming hybrid/electric future will mean the gear lever eventually becomes a thing of the past, so I might as well enjoy a manual 'box while I still can.
DSG would however be my choice in a low-revving diesel, where there is little point in being 'involved'.