I finished my first playthrough of Hitman: Blood Money on the 360.  Overall, a fantastic experience.  I've enjoyed the others in the Hitman series but this is the first one I've really gotten into.  I say my "first" playthrough because the way the missions and Achievements are structured, you really have to do multiple playthroughs. 

On most games, there's no way I'd find the energy to do that.  But the Hitman missions have an interesting and flexible structure, with two big gameplay incentives for replay.  The most straightforward is that they are simply designed for a variety of approaches.  This fosters a kind of exploratory play that I really like, and I'm constantly still noticing new things about the levels.  A more elusive property though is the way the game requires (and rewards) continual forward progress towards a perfect hit.  One colleague of mine likened it to playing a piece on the piano; there is always room for improvement even if you get it "right", and the repetition is an enjoyable part of achieving mastery.

Unfortunately I am finding a few things lacking in their implementation of this process -- most notably a lack of feedback.  A lot of times I have gotten the next-to-perfect rating in ways that you get very poor feedback for (like a witness when none seemingly are around).  Ending the mission and finding out your rating also removes all your saves for the mission, so the trial and error of figuring out why you did not get the perfect rating can be a bit frustrating.  Also the somewhat lengthy load times that are a blemish on the game are much more annoying when you are continually replaying or restarting. 

Still though, those are minor points and for at least a while longer, I'm staying in 47's shoes even after I would usually call the game finished.