I just....couldn't get into it. I tried to go through the single-player two seperate times and it just started to bore me and lacked enough action.
What I really want to check out is the new CS. BF3 didn't come close to what I wanted it to be but i'm hoping CS will.
It lacks action compared to Call of Duty, BF3 and other shooters because Half-Life is a story driven game. The combat is shooting sure, but it's story driven. Gordon Freeman is one of the most beloved game characters ever because of the story and atmosphere/way the game plays out.
You have to play it like a story game that has shooting, and not like a shooting game that has a story, if that makes sense.