The maps I like in bo4 zombies would be Dead of the Night, Blood of the Dead, and classified. I don't like IX and every other map is OK. WAW is bo1 zombies but worse (except for custom maps). So in summary bo3 is awesome, bo1 is damn good, bo2 is OK, bo4 just isn't that good, and WAW is OK (cause of custom maps). These are my opinions, so don't @ me. You can share your own opinion in the comment section if you want.