The ice map is difficult, but it isn't too hard to get (especially when people are still making two high walls that take one mined block to beat the full wall).For some reason, and with my luck, I always seem to fail at DoubleHelix, but I'm not in favor of that map.
For the maps I do like, I seem to enjoy Mushroom and Tree Alley.
The ice map needs to get removed though, do you know how hard it is to get to a flag when their team uses all their blocks on that one way entry?