Far Cry was and still is one of the harder FPS ers IMO along with GRAW
And I agree,the trigens are pretty annoying,especially as they can jump 40 ft and inflict massive damage to you.....having played this game lots of times,its quite good fun to lure trigens into water where they drown,same goes for the big boys,but they are a bit more reluctant to follow.
But like you guys,I'm hoping FC2 has moved on from such sillyness.