Yeah dude, the game's difficulty, slow, realistic pace, and the gunfights are what puts KZ1 in it's own league.
I liked playing as Luger. You can't get thru the levels with pure stealth, but there are a lot of moments where you can spend most of the level undetected. I highly recommend making use of her thermal goggles when you need to, and becoming best friends with her suppressed SMG. The secondary fire on it is a one-hit-kill to the head, so it's perfect at short~medium range takedowns.
LOLFAQs, where anyone who disagrees with you is a troll.