bo2 has the best zombie maps.
Town > Everything else.
People seem to think the maps with the easter eggs are more fun, I strongly disagree. Either your team is retarded and you fail, or your team isn't retarded and it's the easiest thing in the world. It'd be cool if I was good enough to ever actually figure one out 100% solo with like a group, that'd be fun for awhile and then I'd probably get frustrated and rage quit.