The original(not Ghost Recon Advance Warfighter where they complicated everything up)as well as the two expansion packs. I didn't really like too many of the mods people created, most were just down right stupid that created overpowered guns and aiming.
I hosted a dedicated server for about a year and played the game for over 3 years.
The fact that there is no grind what so ever made it great. Every one is completly equal and it's all about skill in the PvP. I did a few of the CO-Op missions on servers, but mostly it was the PvP.
Search and Rescue format was my favorite, its what my server always ran. That format really prevented spawn camping as the opponets spawn was no where near the hostages.
I played alot of Guild Wars as well, but far and away I've enjoyed Ghost Recon better than anything.
