The best First Person Shooter

[FlawlessHappiness]

Hello friends.

I'm a fan of First Person Shooters.

Now according to everyday-people on the internet: If you're 12 years old and are both hacking and whining, then Call of Duty is the game for you...
That's just what I've heard, but in all seriousness I've been stuck with COD Modern Warfare 1 and 2 for a couple of years, and I still like them.
MW1 doesn't really have that much players anymore, and that sucks.
MW2 though, still has lots of players playing, and since I got my new computer, I find it very enjoyable.
It isn't only pros who are able to get kills (That's how it felt when I tried Medal of Honor)

So inb4 fuck Call of Duty.


Few requirements:

Must be multiplayer.
Must have players playing it (Otherwise, what's the point playing it)
Must be PC
Must not be one of the following, because I own the already:
- Call of Duty MW 1 or 2.
- Planetside 2
- Medal of Honor
- Half Life
- Left 4 Dead 2
- Team Fortress 2

Though tell me if those games are worth keep playing
[br]
Price is unimportant unless it's like 100 bucks.