TheoTown

I would love to see some new trees such as red wood tree , swamp trees ( mangroves ) and fruits tree it would add more ambiance to the game .
Would also love to see a biome system implemented in vanilla game ,

Trees are easy to add tho, through plugins. The only thing you need is plugin texture.

Biomes have been suggested multiple times. I actually like to see more types of biomes, maybe savannah grasslands, fertile soil, lava biome, oil biome etc. It would add a certain variety to biomes that spawn.