Originally posted by Farenfax:

The Ocean biome. I know it's practically empty right now, but the visuals alone are stunning, especially at dawn and dusk. The music is peaceful, the serpents are fun, and I like just exploring the world on my ship.

Oceans are a close second for sure, I specifically found a seed with lots of water and islands for my playthrough, the water physics and visuals are pretty good, not sea of thieves levels of good but still epic in a storm! :D