30FPS is fine for fluid motion with some blur, but it is incomparable to 60FPS for twitchy responsiveness. Even a constant 30FPS would feel sluggish (definitely smooth, but sluggish). Some people prefer 100FPS. I don't mind 60FPS myself, but I can notice a difference between 60FPS and 100FPS even with a 60Hz display. I generally don't get anywhere near that though
My tongue-in-cheek mention of CS players was in reference to those who absolutely "must" have 150FPS in order to play.