I loved them all. (Don't get the 2nd book dislike -- I loved it, and thought the second game felt very natural. Huh.) I seriously feel like they're the best serious YA trilogy I've read; prior to HG, that title went to Pullman's Dark Materials in my estimation. Love them.
Has anyone heard the audiobooks? I really like the narration by Patricia McCormick, esp. since she's "the Law & Order child psychologist" to my ears. Very fitting!