CS was THE game when it was launched. I have no idea how many hours I have "wasted" playing it. From time to time I still log on to play 1.6 or source.
on 2003 to 2005 i played this game on LAN with 18 hours per-day, i realy love this amazing game, but now in my country this game is not very popular again
I love 1.6, I just wish it was as active as it was oh, 5 or so years ago. I never liked source much, and played CS more than any other FPS, probably fairly straight for 4-6 years from beta onwards, but it kinda died out and now its hard to find good ping servers that are busy and aren't filled with bots.
It's been a long time since I've played it steady, but it was one of my favorite PC FPS's, probably my fav.