I like Infection the best, but Slayer is right behind it. Sometimes in Alpha Zombies the Alpha Zombies have a Grav Hammer, which is fun to use :D
This poll may help influence future maps. Maybe mine, when I start making them.
Basically, I've been trying to brainstorm a map that is fun, fair, but at the same time, chaotic. I have an idea of a Team King of the Hill game...