I mention this to demonstrate that once I realised what sort of game it was I conditioned my expectations appropriately, given how I've been able to identify other games with a similar take on combat that fall into the First-Person RPG category. Some games, like Fallout 3, are more stat-heavy when it comes to combat, while other games, like System Shock 2, are more skill-heavy. In a FPS if you can see it and aim, you can probably hit it (some games have more advanced projectile physics), but in a First-Person RPG the stats on the weapon can greatly affect your ability to hit accurately. There single biggest problem facing me in respect to this game is that the combat doesn't make sense, stemming from the fact that STALKER is neither a FPS but what I like to call a First-Person RPG.
I'm trying very, very hard to so much as enjoy playing the first STALKER game, :Shadow of Chernobyl.