Like you I love buying books for my kids (and myself). I usually get them from the Book People / Red House / School Link, so always good value. I aim for at least one a month, plus extras for - well almost any reason.
Is this too many? How many is too many - can I go for weekly books?
I was recently at a friend's house for the first time, and saw about 5 children's books, and no adult books - maybe we're mad! I left my DS (2) on his own at prschool for a short while recently, asked the leader how he got on, and she said "he loved sitting in the book corner, taking the books of the shelves and looking at them".