But when I still drove a manual it always felt like I was planning ahead, engine braking early at red lights (which often meant I could coast though it without completely stopping) etc, which you can't do with the lesser control on an automatic. Driving "lazily" in a manual means reducing shifting which often translates to more fuel-efficient driving. Driving lazily in an automatic is very different.

I'd love to see a study on hypermiling with auto vs manual in real-world condition. AFAIK all the efficiency numbers we have are just based on purely mechanical tests on a driving cycle on a dynamometer, and we all know what that kind of testing leads to.