Cheap. I've been developing very good willpower when it comes to Steam. Unless the game is an "omg NOW" purchase on the deal, I don't get it. It's as simple as that.
Haul:
Half-Life: Blue Shift and Opposing Force
For the price, I couldn't say no. Finally rounded out my Half-Life collection. I played about half of OF and the first few hours of BS back in the day, but never got around to completing. These two titles will sit in my backlog for a long while, I know, but that's okay.
Jamestown x2
Purchased and played to the end of mission 3. Immediately quit and purchased a copy for my current lover. Fantastic game. Quite possibly the greatest aesthetic in a videogame ever.
Portal 2 and The Final Hours of Portal 2
Was waiting for a sale price on this one; got a sale price.
Terraria
Wasn't even going to bother, but GAF convinced me otherwise. Here's hoping it's up to my personal tastes.
I also received as a gift Assassin's Creed: Brotherhood, which I'll be very excited to jump into once I'm done with Portal 2.
I very almost bit on X3: Terran Conflict, but decided to delay such a huge game for the Xmas sale. After a moment of deliberation, decided I'd do the same with Vampire the Masquerade: Bloodlines, too. Really, I'm wishing for a GoG release for VM:B.
Also picked up Arma II (singleplayer and multiplayer) for free from Green Man Gaming using the voucher THESU-NFREE-ARMA2. I advise you all do the same.