Had lots of fun with Sin multiplayer though and the first levels of the campaign were awesome! Later on it had the same "problems" as HL1 in it's campaign with all the absurdities.
But there is one thing where Sin was especially outstanding: Loading Times.
I never full played through Sin. I started it several times, but it just seemed very generic after playing HL.
I remember it being somewhat over the top with its attempts at comedy, and that's not something I generally like in FPS games.