Halo: Hailed as the best shooter ever, i love the game, but the online mode is, well, full of either n00bs or ppl sooo good i can't win
Gears Of war: Some say better than halo, but i think not. I like this game, cool gameplay and brilliant storyline. My issue is that you can only have 4ppl per team, so, it is restricted a lot, not to mention the fact that it is extremly hard to play at times
Battlefield 2: This is great on PC, unlimited teams, ranks, everything. my only doubt is the lack of choice weapons wise and gameplay controls, gets confusing if you play Halo or others too much
I vote... well.. i can't, they are all good,but all have their drawbacks