Creative

add all the gamemodes (especially /gamemode 0)
add /enchant (let us have infinite values or atleast up to 10)

Its so hard to punch all those grass/stone blocks when you could easily mine it away with a eff 10 tool in gamemode 0

Of course when worldedit comes this wont be needed but it could be used as a test pvp arena.
and /fly when in gamemode 0

 

+1 for gamemodes in creative -1 for /enchant. no reason for it

 

what if you wanted to insta mine obsidian fast, eff x pick while in survival would do the trick

 

yea eff 10 doesn't auto-mine obsidian. hell it doesn't even auto-mine end stone(might with a haste 2 beacon)

 

then raise the cap

 

This defeats the purpose of creative.

 

Another suggestion has already been made describing the same ideas, therefore, this one is denied.