It's my first steam sale. I've got a good laptop, and with some the prices...seemed like a low barrier of entry. Since I'm gaming from my laptop, and am mostly a console gamer, I'm not picking up anything like Crysis or something. But man...I understand how some people go nuts and spend a ton of money on these sales, because the prices are really tempting.
Mostly been RPG's and Strategy games. Got Bastion, Freedom Force 1 and 2, Hacker Evolution, Tropico 4 Collection, CIV Collections which brought pretty much everything for all the CIV games except GODS and KINGS.
Pretty sure I'm not done, yet. I might pick up Sim City 4 if that goes on flash sale, and probably Half Life, since it's always been a series I've always wanted to get into.