I agree with Bebpo/dark10x about the "weight" of the guns in FEAR and the weird overall feel to the shooting. Most shooters have this problem, especially on the consoles, since the mouse/keyboard combo helps alleviate some issues. The ones that solved it are the most successful, like Halo, Call of Duty, Gears, and R6V. Unfortunately, Valve still hasn't gotten it right, though L4D is a small improvement over HL2.
It's hard to describe exactly what makes a console shooter "feel" right, but it's a combination of camera, aim assist, sticky aim, analog stick acceleration, visceral weapons, player movement, environmental interaction, and many more factors. It's really fucking hard to get right, and even solid B-tier FPS games like Far Cry, FEAR, Resistance, and many more just don't get that "feel" right.
I'm not sure why duckman/AA/whatever is turning his nose up at Halo. You might not like the game's design, setting, enemies, fans, or whatever, but it's undeniable that it gets the core movement and shooting absolutely right, which is what this discussion is about.