[Fat Charlie]

The one guy I spoke to who disabled his cylinder deactivation (in a Challenger) had a manual. Without an auto's inherent slop, it's not exactly seamless. Just like an automatic's downshift, it waits until it sees power demand- then it doubles the number of cylinders firing. It sounds like if you've got an auto it's just an extra downshift feeling- a bonus reminder of how much power you've got.

He also disabled his skip shift. He bought the manual... because he wanted to make his own choices with the gearbox.

I'm a fan of cylinder deactivation myself, and I'd also love stop/start. The car trying to influence my gear choices? Not so much.