I learned long ago not to overthink the hobby. There are plenty of things I can overthink about... work, real estate, family relations, and the like. Here, I spare myself.
Plus in agreement with many others in this thread, nostalgia is a primary but -not- the only driver for me. "Incredible art in my eyes" is another driver that can easily make up for the absence of nostalgia. With many of my favorite pieces, I had no idea who the artist was growing up.
Off the top of my head... Frazetta, Royo, Lightle, Sienkiewicz, etc.
Also, nostalgia can derive from a much later period in life. Doesn't need to be childhood.
That said, I haven't picked up anything new since Nov... this has to be a personal record. Complacency. : > What oh what will break the dry spell?