Depending on the Halo and on the CoD. Halo 3 was better than CoD Mw2, and WaW, but not better than Modern Warfare. Any CoD was better than Halo Reach.
Yeah about the Xbox vs Ps3... It was the only example I could think of at the time. I don't like to have that conversation either. Especially with people who will listen to nothing about the other console, and will stick with the console they play no matter what.

Cooked Dogshit in my mouth > Twilight
Mtn Dew > Dr Pepper > Pepsi > Coke

WWE or UFC?
(Obvious answer ftw)