Everyone do yourselves a favor and buy The Walking Dead.
I know my recommendations might feel weightless, because I like so many games. But The Walking Dead, however, is my personal GOTY for 2012. It's one of the best implementations of storytelling, ambiguous moral choices, emotion, and human interaction that I've ever seen in a video game, ever.
Hell, the moral dilemmas faced in this game even surpass The Witcher in terms of complexity and urgency. You are forced to make some decisions here that will literally make you pause for a while and reflect on your own beliefs. But don't just buy it for that; buy it for the excellent writing, the interesting characters, and one of the most intense gaming experiences ever crafted.
Also, don't be put off by the "comic-book style" graphics. It's a very adult, thought-provoking game.