nah its more HL is really a strong story based game, its like a book really... once you've ready it once you know all the words and somehow it looses its appeal.
however there are other story based games which don't loose that appeal - Oni for example, not because the story is different but you do have some real choices to make ingame.
for example do you kill the Commander for lying about who you were for 18years or do you give mercy and let him live. Or how about when your breaking into Neogen to get at Muro - there are several ways in, some sneaky, some not... they all lead to the same rooms that you must got into - but the different routes and even possibilty to change which route half way makes it compelling
Half-Life's edge was the story, once that was gone the game just isn't the same ... why i like the Quakes so much, theres bugger all story to really speak of just good clean fragging - they're true pickup'n'play games. Though Doom3 does prove that id can actually make a mean story based game too, something that'll scare the poop outta the faint hearted to hehee
Within the Epic battle of the fates the Shadow and the Angel will meet. With it will harbinger the very fight of good vs evil!