I love this game. I'm getting Hitman:Blood Money right when it comes out.
Anyway, his game has all the elements of a great game: Good story, Good graphics, great gunplay, and awesome stealth kills. My favorite is the Snipe, simply because it's so quick and fast that no one knows it was coming. I love it. I was often wondering if it was created by a former and/current Hitman in real life. I also wonder if wannabe-Hitmen take notes from this game. It's not that hard to think that.
My closing quote is that Hitman is for stealth lovers. If you like Splinter Cell (like me) and are not scared of the dark (like me) then buy it. You will not be disappointed.