Don't know if you're being sarcastic, but I watch gameplay videos to see how good players react. Solid play from people like Ogre 1 and Ogre 2 still hold up for FPSs today. Watch MLG/tournament vids for Halo3 or 2 vs CoD. The time to kill is completely different. You'll see a lot more positioning in H2/3, a lot more thought and strategy. The skill gap is huge in a halo game. In cod it's run and spam your ridiculously fast-firing smg/AR as soon as you see someone. Still takes skill, but in Cod you have all these gear perks and ridiculous kill streak bonuses which just make it easy to maintain your kill streak. Nothing like that in halo. On my phone so pls excuse typos