I read six Halo novels last year!!!
I loved Greg Bear's Forerunner novels, they really made me fall in love with the Didact to my surprise (former Didact hater here). His romance with the Librarian was so bitter-sweet and heartbreaking. Ive got to get my hands on Epitaph this year, my heart is gonna hurt >_<
Broken Circle quickly become my comfort read, I think I reread it four or five times. The audiobook is also an absolute standout, narration is phenomenal. G'torik is my absolute king, and the adventures of the Ussans just make me want more stories about them! The shanshayum were also interesting for the first time ever. My eyes have always glazed over at their presence in the past but this was downright fascinating.
Legacy of Onyx is perhaps the biggest surprise. There were such intresting little family dramas going on amounst the Sangheili, and the concept of pacifist sanghelli was deeply fascinating. I'll admit I wasnt fond of the children or our main character at first, but gosh darn it Matt you made me really care about them. Also Sasha Hilot is officially the coolest Sangheili ive seen yet that ISNT a warrior.
I did give Fall of Reach another read again for that sweet sweet John angst. Love watching him suffer and be horribly traumatised, just running around like this is fine I have a good grade in being a child soldier :) which is both normal to want and possible to achieve :)
Update: I've since got my own copy of broken circle :3