What Are Some Good Modern Warfare 2 Classes?

Well, no me. But my brother certainly have. He's crazy about Modern warfare, he used to play online more days and days. I love the game, but I have no time to play it. Busy with studies and stuff. This is bad to I miss to much because I am not playing Call of duty modern warfare 2. But I played the first part and its awesome, I would say it's kinda of short game, But still its worth it.