I originally got Half-Life many years ago (not when it first came out, probably a handful of years later) but never got very far. Then played it again 2-3 years ago, and again found myself getting stuck/bored too easily, and never got more than about a third of the way through.
Anyway last couple of weeks I finally played it properly, plus the Opposing Force and Blue Shift expansions.
Pretty good game overall - I can see that it was hugely innovative and influential in terms of narrative within FPS games, but in the main game itself, playing it now, I actually thought the narrative could have been stronger. So many key things could easily have been missed (and some I did miss) by looking the wrong way at a particular moment, or not being near enough to a speaker/radio to hear what's going on.
That said, putting the game and expansion packs together creates a really good narrative.