Eh, I can't really describe the depth in CS better than just saying its like a golf swing. I don't play golf really, but I know people devote a lot of their life to swinging a fricken golf club correctly. You can spend a ton of time in CS learning how to fire a gun correctly and how to move correctly, and how to throw off an awper with movement tricks and timing. It's why most people will agree that you can't just pick up CS after not playing for long periods and compete at a decent level. You have to get the muscle memory and intuition back. Someone just said that CS is anything but a fast game, but to get really good at CS, your actions have to be automatic, so while there may not be constant action, the action that does happen is very fast paced.