I like Execution more, it makes people get up close instead of hiding 100 feet away shooting the Lancer. Though, Warzone is fun from time to time.

I dunno. I love both. I started playing the game as only Warzone, so I got a good feel for it, but a while ago I switched over to Execution for a change and it's great fun too. If you're good at sniping people in the head, blowing them up, or other execution kills, execution is fun because it lets you take your kills for yourself, and makes it harder for others to steal. If you like working with others alot than I find Warzone is more team-oriented, so long as people don't jack yo downs. I do find switching back and forth is fun, but I find Execution to be much easier when noone on my friend's list is online because I'm better at working alone and Execution gives you a chance if you're downed and the last person on your team alive.