I will often buy Steam games on a whim, with money I make in Team Fortress 2 (yes, it has an economy), or splurge when Steam has a big sale. But I end up not playing some of them because I don't get in the "Adventure Game" or "Real Time Strategy" mood for example. Long Story short, if anyone is looking to trade some games, let me know.
I think right now, I have The Witcher 2 and Dust: An Elysian Tale sitting in my inventory. But I'm always adding and subtracting from that list.
If you are interested in trading, or just posting your stuff for possible trades with others in the future... post below.