Long before my switch to MF (which I almost always expose in B mode with all exposures multispot metered!) my photography with an EOS 1N and 1NRS took place with the mode in Av.
Even with TTL flash, it was in Av or P+shift for re-balancing. On occasion I still swing with the EOS 1N, and it’s unfailingly set in Av. Or M (uncommon, but some conditions dictate it when full control must be handed over to me).
I don’t see auto as cheating really. For people with a limited understanding of photography, or those with a learning or a visual disability, involvement in photography can be, and is, a very stimulating and rewarding activity. It matters not then the how, why or wherefor of camera settings, other than recognising the potential of a scene to make an attractive photograph.
It’s silly to spend any amount of money on a camera and not avail yourself to the full-auto or green square mode: at the very least, the results will tell you how the camera interprets the scene and how it manages scenes with ordinary and challenging extremes of of contrast. It will also throw up the occasional pointed question: “Can I do better than the camera?” And, “how would the photograph have turned out if I had full manual control?” These questions are a natural progression of learning photography and becoming an independent thinker away from the camera’s level of taken-for-granted automation. You don’t see full-auto on a Linhof 4x5, do you? No, because that camera is for the thinking photographer. But any thinking photographer can completely bypass camera automation to create the scene he envisages, with any camera at all.
There is also the matter of being prepared for circumstances and have the camera ready e.g. in street genre photography; obviously you risk under- or overexposure if you’re shooting suddenly set to Av, Tv or M and not caring much to make adjustments (or forgetting them!). Full auto gains the upper hand in these circumstances, unless of course the photographer is adept at making on-the-fly adjustments in e.g. manual or another mode. Personal preference, as well as circumstance.
Is full-auto restrictive? Yes! The camera is taking control of all exposure considerations. A photographer is foolhardy to claim credit for an outstanding photograph if he shot it using full auto (as is so blindingly obvious with the digital fanbois). The camera made the decisions on exposure and adjustments, the photographer only aimed the lens and perhaps changed the zoom setting! This is why digital is so popular: the very high level of automation and instant feedback on duds/keepers has made creating a beautiful photograph very easy to people with limited to no understanding of the foundation principles of exposure or photography.