Favorite:
Pizza(Team) is a very fun map with lots of early and late game potential.
Space(Team) is good for camping, and the max build height being quite high means that there are many ways to play late game.
Kingdom(Team) is a very effective map best for those who play it often.
End(Solo) is a fun map for farming points by endlessly destroying people's eggs.
Safari(Solo) is fun for destroying eggs.
Snowy(Solo) is good for rushing, and also more versatile gameplay.
Forest(Team) is a nice map for 2v2v2v2v2v2, and has many ways of possible gameplay.
Rome(Team) is good for when you just need a quick, less than 15 minute game.
And, best Solo map has to be Mine(Solo), because each team is equally likely to get the diamonds, and that each team has so many ways to play the game.
Could be improved:
Toys(Team) has potential, but is prone to 6 teams camping forever.
Under Da Sea(Team) has potential.... not much, but it can be improved by making each team equally likely to get to the diamonds.
Construction(Team) has potential, but the distance between the islands, the semi-mids, and the mids needs to be shortened.
Dwarven(Team) has potential, but it is broken due to how insanely likely you will be bum-rushed from the start.
Instruments(Team) could easily be improved by fixing the camping issue: making the islands closer to each other.
Oriental(Team) could be improved by decreasing the number of ways to get to the egg on your island (currently there are 4).
Least Favorite:
Tropical(Solo) doesn't work in terms of block placement.
Storm(Team) doesn't have any easy way to get to the mid without getting bum-rushed from the start.
Steampunk(Solo) makes it almost impossible to play without your egg being destroyed.
Vegetables(Team) is very glitchy with the vegetables.
Tea Party(Team) is insanely broken, and getting someone's egg on Tea Party without them noticing is insanely easy.
And, the worst of all,
has to be Magic(Team). On Magic, it is literally impossible to get to the diamonds without getting rushed. Rushing is the one and only way to win on Magic, and getting diamonds and camping is so easy; the map is literally made FOR campers.