How about some blocks that are placed in the air when the planet is generated? The are fluffy and you can stand on them. They can be used as a cushion if you are falling and are found on low gravity planets. You will need a vacuum to pick them up. Then you place them were you want. Perhaps you will need special equipment or potion to walk on them. What uses can you think of for them or what could they be used to craft? Maybe there could be dark ones that can rain.
while its a good idea, if we focus to much on different block types the game will become a terraria, and solely revovle around the blocks and crafting. maybe you could just make it that you sink through clouds? collecting them need to be a carefully planned idea though.
Perhaps they could be used to craft a special bed with a punny name relating to sleeping on a cloud. Maybe sleeping on the bed could provide some kind of buff.
I don't think they should be floating along in the air but it would be a great addition to have blocks that disappear when you step on them. That would make for a great adventure map item for map makers.
That's not quite true. Every aspect of the game is important. I don't think anyone wants any single aspect to be anything less than its potential.
