So I wish there was something like creative mode in Minecraft. This would be a separate option when you make a new character.
How it works
When you create a new character you can choose between two mode. Creative or Normal.
Only one character can be in creative mode.
Basically creative mode would give you a medium size world that is single player. You will have everything available in a creative menu.
Some of us are new players and do not know much about the blocks available. I think it would be cool if you could test how blocks look together and practice designing buildings.
Also, due to level cap, you will not be able to get every skill. Therefore, I am spending all skills on crafting to make sure I can get the blocks I want. This automatically makes me a crafter/builder. I may not be able to get enough point to be skilled at Hunting if I want to do that also. If I can figure out how many skill points I need for a block I find out I want, I can then plan my skills.
Sharing with people
So you could generate a code and send it to people. They can open this world as a random character, not one of theirs. They can walk and fly around, but not change anything.