I like a manual shift on a motorcycle. Not so much in a car.
For me, the difference is "engagement". Cars are for transportation. I don't really care if they can't predict the required gear for the next uphill/downhill/pass. On my motorcycle, I want to be actively in control of which gear I'm in and the corresponding RPM.
I do understand that DCT transmissions offer the opportunity to choose a gear, but it feels like that would be an afterthought. I think I'd like to be more engaged.
You nailed it for me. My Subaru Outback XT (turbo) has an automatic tranny. It has a "Sport" mode as well as the normal mode. The normal mode tries to learn your driving habits and shift at those points. Great technology. In Sport mode, it responds with no hesitation. It also has buttons for shifting manually if I want on the steering wheel, and I can manually shift also with the gear shift.
As much as that car will give me the biggest grin from one ear to the other when you drive it like it can...it is still not like riding a motorcycle. Driving a car is like watching the scenery on a big screen TV. Beautiful picture...but it is missing something. The automatic tranny on the Outback works well on it...but then it is a cage.
My XR has a quick shifter. I don't use it. I want to be in the moment. I want to be engaged. The height of being engaged for me, is being to the point where I don't think about what I'm doing...I just do it. Shifting, braking, accelerating...all that is part of that engagement. If I do it well, it is so fluid there doesn't seem to be a separation of the machine and me. I think, I do, and the bike is but an extension of me.
The DCT is great for some. Not me.
I worked in the evenings in high school at a used car lot that specialized in muscle cars. We had GTOs, Vettes, etc. My favorite two cars were a 68 Ford Cortina and a VW Beetle. You could race those cars down the road maximizing what they could do...and no one noticed. You were just keeping up with traffic. But they were fun to drive. Both had manual trannies.
I have all the electronic aids on my XR. Cornering ABS and Traction Control. An IMU that adjusts the suspension as I ride down the road. Cruise control. And more that doesn't come to mind readily. I've used ABS once in the past on my Honda NT700V. But in my mind, while I can justify Cornering ABS for being a "safety" feature...if I use it, it means I'm not connected with the bike I'm riding. It's my fault...and I shouldn't need "features" to cover up for my ineptitude...and a DCT falls in the same category to me.
It's sad when having a manual transmission is now an anti-theft feature.
Chris