My first job is to write a book that I believe is compelling and deserves the long sustained attention that any novel requires, and to worry about the commerce only late in the game.
Every time you hear someone read your book and liked your book, you're never sure whether that's going to follow with a similar remark from someone else. Perhaps I have low expectations, but whenever I hear someone say, 'I liked your book,' I don't know if it's going to happen again.