ah nice post marine.
For me I will go by my fondest memories. In order
1) Counter strike 1.5/1.6 (Good times all around. Scrims were lots of fun. Running 2 full servers at the age of 15 was very cool too. 1 server for the stock maps and the other all custom maps)
2) Soldier of Fortune 1 (not 2. Fuck yeah gory as hell and MP was fun as hell. CTF ALL THE WAY!)
3) Ghost Recon 1 only with all its expansion pack. realistic as fuck, fun as hell. The second and third just suck. Its more arcade-ish
4) Mechwarrior 4 (love the SP, great storyline, and MP)
5) Battlefield 2 (Jets, choppers mostly. Some fun times as Infantry)
6) Battlefield 2142 (Gunships really)
7)Call of Duty 4 (best COD out there today)
8) Call of Duty 5 (remember hating this and others forcing me to play it. Reminiscing now, its not so bad :>)
9)Soldier of Fortune 2 (yyyyyyaaaaaaa more goriness. But not better than original)
10) Counter Strike Source (its blah can't get that enjoyment from older CS)
11) Bad company 2 :>