Altough the game as you know is awsome, there is somthing I would like to have seen or see. Abilty to shoot of limbs such as arms, legs and even there head. There was others I thought of, but I can't remeber them so they can't have been that good. Post anything you would lke to see in future versions of HL. Maybe if there is ever a HL3, what you would like to see in that.
I would like to see more extended use of physic controlled objects in structures, and overally things like shelfs actually filled with alot of smaller objects what would create bigger realism feeling of the in game world. But ofcourse, when pc performance will allow... As for your suggestion about parting limbs. It would be rather very unrealistic to often see this, ofcourse things like grenades and rockets are actually able to sometimes do it, also very high caliber weapons like the ones Gunship and Strider uses. Still I would like to see it myself, but kept on realistic level.
I want to see next-generation FPS style of gameplay like Call Of Duty 3 or Brothers In Arms: Hell's Highway. the way the player moves his weapon and etc is very good. hahaa lol...
I think that this part of Half-Life 2 already looks very good, although enchancements will be always welcome. As for those games, they might be good but I wouldn't call them next generation games.