Well, I have nothing else to do, so I'm gonna give my opinion on every map!
Angelic- It's a good map, but it lacks something special. This is also a map where you can camp at the top far too much.
Atlantis- It's a good map, the islands have a good distance apart, and it's very different from the other maps!
Beach- My favorite map. It's so unique, it's good for traps, it's hard to camp, and is good for PvP!
Biomes- I HATE this map. The islands are so far apart, the inner ring has a major advantage, and is horrible for PvP. If you get the sand island on basic chests, you're basically stuck there.
Birdhouse- I cant find anything good or bad about this map, so I'm neutral.
Bones- It's a good map, and the islands are really close for good PvP.
Candy- This map is great, the islands are a perfect distance apart, but lacks space to PvP.
Castle- This map is good for setting up traps, and is really good for PvP. It also has a great set up.
Desert- I like the distance between the islands, but having to dig for chests is annoying.
End- If you don't have a pickaxe and you don't get blocks out of the chest, you're screwed apart from the 12 or so birch planks you can obtain.
Flowers- This map has an INCREDIBLE setup, is good for PvP, but lacks good paths to walk on, and is easy to camp.
Galaxy- This map is just horrible. There is no room to PvP, it's easy to just fall into the void, and you can jump between islands far too easily. There are also no mineable ores on this map.
Glass- Plenty of room to PvP on all islands, good for making traps, and plenty of salvageable blocks.
Gravity- These islands are way too small. Two eggs can knock you off the island. Also, that mid is ugly, and no offense, looks horrible compared to other maps on the server.
Ice- Ice isn't great to PvP on, but it still has a good setup, so I still like the map considering this is another map to make traps on.
Jungle- This is my 3rd favorite map, but it's behind beach because it's less unique than that map and it's easier to camp.
Magic- I could go on for days as to how much I hate this map. This is without a doubt my least favorite skywars map. There are too many campers, it has a horrible setup, and it's impossible to find anyone even with the compass.
Mines- This map isn't good for PvP, and it's very messy.
Mushroom- This map isn't good or bad, another neutral.
Music- Another fun 12 player map, plenty of room to PvP
Mystic- This map has no room to PvP, and looks very messy.
Nether- Another neutral map, nothing good or bad.
Favorites:
1. Beach
2. Trees
3. Jungle
4. Paris
5. Sundae
(I'll post more later)