Is it easier to use a controller like XBox or PS3 style than the traditional mouse and keyboard?
IDK i have a hard time trying using sights and shooting a target while they are moving.
Maybe some advice?

Mouse and keyboard are more precise and flexible, joypads use autoaim because they're so clunky and lack precision with FPS. Get a good quality mouse and keyboard, if will pay off in FPS games.

I personally never use my joypad for anything other than driving and platform games.

I have as pretty good mouse and keyboard already, Still not that good at aiming down sights or shooting far. I watch the kill cams and i see people stay dead on target (me) when im jumping in the air and running, I cant aim that good....