Its hard to pinpoint with exactitude the books and the changes, but even though I forget most of what I read, I figure it's all in there somewhere, working away at my sense of identity and the world. For example I know that James Joyce had a big influence on me when I was 18, despite me being too young to understand his work, and now recalling hardly any of what I read. I feel other authors, like Chekhov, Tolstoy, Flaubert and Kafka, influenced my world view - but maybe they accorded with it? (Or parts of their work did.) Some of these writers, as great as they are, have exercised a poisonous influence on me, and probably due to misreading, or taking too seriously. I'm gullible in life and in literature.
Most recently, I felt that reading Paradise Lost has a great effect on the way I think about literafure, art and life itself. Yeats ties into this change, which Luka has also helped create. An interest in symbolism, in spirituality, in the imagination and so on. I was an atheist last year. I still don't believe in God, but I have changed my mind about religion. My mind isn't made up at all but it has been unmoored from a materialist viewpoint I have found (unconsciously) unsatisfying.