Hi, just started a new world and was so amazed how good it was I wanted to share. It's one of these, I don't know if the third letter is l or I (lower case L or upper case i).
J4Izw5RdVJ
or
J4lzw5RdVJ

What is so good about it? The center is a "tiny" ocean, safe for fishing. It is surrounded by a circle of land, like a ring where the center is a sea, easy for starting zone. And the big seas are surrounding the ring of land. There's lots of nearby mountain biomes that allows taming wolves easily and has some silver. Then there's the North part of the world. It is a hilarious how good it is. It's one thick line of land that stretches from the center ring land almost to the end of the map.
It starts as meadows. Then it turns to black forest. Then comes huge mountain that is surrounded by swamps. Behind the mountain, you probably guessed, plains biome. Then a swamp and then a huge mountain and behind that? Mistlands. Huge area of mistlands. After mistlands you have have reached Deep North biome. All this you can reach without a boat. There's one river that I could spot between all this and it's a swimable distance.
The first shop is also reachable by running and isn't even that far away from the starting spot.
Leviathans spawns in group of 3-4, only seen one spawned alone.

If I could say something negative about this seed is the center is inaccessible with large boats, you can use the Karve to travel there, there's plenty of rivers. And Bonemass is quite far away.