I'd say I'm mostly a Polygamist reader, a little bit of an Extrovert and an even tinier bit of Altruist.
Book lovers have different personalities just like ordinary people. We find it hard to choose only one as it also depends on the book(s) we're reading. For the most of the time we'll go for a mix of Polygamist+Extrovert+Altruist. Some books, however, make us monogamist introverts. And a very very tiny percentage of titles change us into neurotic readers.
How about you? Share your personalities in the comment section below.