I've only had manual cars all my life, but went for the DSG this time.
I don't reckon I've got anything to prove, I can drive a manual, end of story. I hadn't thought about the DSG until my test drive, and the demo car was a DSG. Afterwards, the cogs started turning, and I thought about it, and thought about it, and as I had also realised that I didn't like the leather as much as I thought I would, I decided to spec the DSG instead of the leather.
I like being able to keep my hands on the wheel and let the car look after the gear changing. Most of the time, it's doing a better job than I would (goes to 5 to climb hills I'd just have left my manual in 6th for, stuff like that). I'm still grabbing for the stick and feeling for a clutch sometimes, but I hope to get over that soon. I've not got in the habit of using the paddles occasinally when I can see stuff ahead the car can't, but again, I hope to form new habits soon.
I haven't seriously tried driving it in manual, and I haven't tried sport mode, so not knowing, cannot say.
The place I notice the difference, which isn't what other people were talking about, was the effect at slow and very slow speeds. Not having a clutch to let in gently seems weird, and the ride can be a little more jerky as a result. However, I'm not sure that isn't largely an effect of not knowing when the gear change is going to happen. Someone else spoke about reversing into a narrow garage with a step up. My own garage is on the flat (not so great, it sometimes floods), so I don't have that problem, but I can understand the problem. Situations where you'd ride the clutch and use the clutch to control a very slow speed, don't work the same way.
This hasn't caused me any problem so far though, and in general, I'm a fan.
Rolfe.