Woah, don't be too quick to judge our old friend Half-Life series.
Half-Life is anything but generic.
Physics puzzles, immersion via no custcenes, interesting characters, unique battles, and most important its storytelling.
That's right... Storytelling.
Okay, we all know the story isn't the best story to hit computer gaming, It's not like it's the most complex or unique story in the Sci-Fi genre.
Hell it's not even a story I would repeat to someone.
However the storytelling is brilliant.
The world is told through experiencing it, never do you have to read about what happened, nor listen to a character giving you the 'This is what happened' story.
This is where Half-Life excels, you discover more and more about the world as you play on. Most of its told by the most subtle means. Characters, locations, technology, society, each having a story to tell of how they were affected by the 7 hour war.
All of which can be discovered by paying attention to little details of locations and characters.
And to top it off as you learn more about the world (or as the story is told to you), the immersion is never broken by cutscenes, or 'informative' loading screens.
I'll stop ranting to stop myself sounding like a fanboy.
And with that said, I don't even consider myself a huge half-life fan.
Hell I don't give a rat's arse if a new Half-Life game never emerges.
However what I do appreciate is the unique qualities that the Half-Life series has brought to the FPS genre.