The reason this has been such a though decision for me has to do with the things I value in a Macbook: Design/Form Factor/Style, Larger display size, usability features: Ports, display quality, speakers, etc.. and performance.
I value all of these in a Macbook. But, the Macbook that excels in all of these areas doesn’t exist…yet! I love the 15 Air for its sleek design and display size. I’m drawn towards the M3 Pro for its usability features and performance. Delima!
With regards to display size. I think Apple nailed it with the 15 inch (e.g., my current laptop is a 2018 15 inch pro). I wish they still offered it as a size option in the Pro lineup. The current Pro lineup has the 14 inch, that I find slightly too cramped…and the 16 inch which I find slightly too unwieldy. Delima!