Like I've said before, you're comparing apples and oranges. In Quake, you've got people moving around the map at a lightning-fast pace, trading railgun and rocket shots with each other and having very quick gameplay with high amounts of deaths. In Halo, it's a lot slower compared to Quake, and the players take a lot more hits before dying. The gameplay is then centered around a fight for control of the power weapons in order to gain the upper hand over the enemy. The gameplay is designed with the console in mind, which is why it works and fits the speed of play.

Both games have a high skill ceiling, as Quake requires a lot of practice in reaction to nail those rails in mid-air, while Halo requires a lot of practice in map knowledge for the sake of team tactics and knowing the weapon/vehicle locations as the maps are designed in a less symmetrical format than Quake and other older FPS games. One has a focus in "skill"/reaction , while the other has a focus in "meta"/game knowledge. That's not to say that Quake and CS don't require any knowledge of the game to play well in, but it's less of a focus.