Counter-Strike is not bad considering it's sold 25 million copies of it in total from when it was first released. It has the most customization for any FPS, and it's customization for server owners is endless.
And it's easy to take down a CS server. Google it if your so butthurt. Less QQ more Pew Pew kid.
I hate people who say
"Less QQ more Pew Pew"
and don't even get me started on "kid"