I've been playing Thief: the Dark Project a lot lately. It kicks arse. It also sucks up my time like a great big time sucking machine. One especially cool part is that when you go back and play it on harder difficulties, the levels are different with added objectives.
Which means I explore levels more now and get the shit scared out of me more, like the voice that told me not to steal the gems from the face of a statue I was looking at. Or that time I thought I'd lost the guard chasing me only to get a sword in the back of the head. I screamed so loud on that one everyone here asked me what was wrong. Fightened the shit outta me.