I do. I know a guy trying to revive this feeling in a fan game, it looks really great this far. The thing that interests me the most is (like Penumbra) that the game relies on the physics, everything is based upon physics.
If you got a rope arrow and shoot it upon a barrel high up on a platform or the like, if you start climbing, the player mass will drag the barrel down, meaning the player will get the barrel in his/her face! Aaaaww what I like that, why didn't Ionstorm think about that? Since T3 uses physics.
But now back to the Thief series. It's the best Sneak Them Up (Yes, there are such a genre) game I know. My favorite faction is Hammerites and City Watch, their comments when running after you after being spot makes me laugh so much at times!