I think we all reassess as we get older.
Yeah! It's not that we are trying to avenge ourselves on our adolescent selves for being carried away by youthful enthusiasm. In fact there's a great quotation from Joyce Carol Oates that I need to find, about the adolescent as the ideal reader. Or you could take remarks by C. S. Lewis and Alan Garner on that aspect of our reading experience.
But I'm of an age now to reflect on this: I have spent much of my life reading*; well, what was it like, how did my reading experience change? What have I come to understand about the literary imagination in general and my own imagination specifically? What do I now regard as worthy of love and admiration, what now do I still feel affection for, and what have I come to see as deficient or even as counterfeit? Lately I have written, for my own use mostly, thousands of words about my youthful reading of Tolkien, Burroughs, Dunsany, Lovecraft, Garner, &c. These are both autobiographical and critical documents, and, among other things, a lot of this writing has helped me pass some time in which I have been recovering from surgery (which went very well).
The essential book on reading -- I wish I could give every interested person at Chrons a copy -- is C. S. Lewis's
An Experiment in Criticism, which sounds dry and academic. Oh, dear people, no -- it is a lover of reading reflecting on his experience, addressing himself to other readers, thinking about what makes for good reading experience, etc. It is loaded with insights that will confirm themselves in your thinking as soon as you read them but that perhaps you haven't thought of before.
To anyone who is a bit nervous about reading something by Lewis because of his well-known Christianity -- I would assure you that you have virtually nothing to fear here. There is part of one sentence, at the very end of the book, that reflects his faith, but I think you will not be too put off by it. He writes, "Here [in reading great literature], as in worship, in love, in moral action, and in knowing, I transcend myself; and am never more myself than when I do." I think that's about it.
*Background: Some years ago, two things seemed to nudge me to start writing autobiographical documents. One was reading a long collection of anecdotes by a man who'd worked for the city of Coos Bay, where I lived as a kid (I knew his daughter a little), and the other was seeing my dad's memory becoming a bit impaired, and realizing that things you once could remember easily might, with age, become irretrievable. And as I have been writing these documents, I have been struck by how much of what I remember of my youthful days is connected with reading, and prowling bookstores, etc. I have no memories of scoring the winning touchdown, I didn't mop up the floor with the other side in a debate tournament, I didn't work like a slave at some hard open-air job, I didn't fight in a war, etc. I remember friends, I remember first love, but much of what I remember was books. So I've been reflecting a lot on a reading life.