I've read books in 2012, but reviewed very few of them here, which means that I will be able to surprise you all with my favorite picks, yes? The trouble for me is finding books that were actually also published in 2012, since I tend to explore backlist books quite often (especially as I am years behind on my TBR pile). Nevertheless, here are my choices:
The Miseducation of Cameron Post by Emily Danforth
A Montana girls loses her parents and believes it's because she's kissed another girl. Danforth takes the time to spin out the narrative into something substantive. Longer review here.
The Rook by Daniel O'Malley
When Myfanwy Thomas wakes up surrounded by bodies, she remembers nothing of her past life. She has only a series of letters from her past self to guide her through a treacherous secret agency and the use of her own mysterious powers.
Roller Coaster by Karin Kallmaker
A solid lesbian romance by my favorite author in the genre. Longer review here.
As for most expected-to-be-coveted books of the year, I am very much looking forward to the publication this month of Diana Peterfreund's For Darkness Shows the Stars, as well as Lois McMaster Bujold's latest Vorkosigan saga book, Captain Vorpatril's Alliance, for which I must impatiently wait until November!
For those interested in forthcoming books, check out this Kirkus Reviews post on the Top 10 Most Coveted Speculative Fiction Titles at BEA.
ETA: I don't know how I could have forgotten how excited I am about The Blinding Knife by Brent Weeks, which is due out in September. I burned through the first book in the series and have been waiting for this one ever since I read the last page. Suvudu published an interview with Weeks that just served to whet my appetite.