Guild Wars 2

How about adding an option to use whole stack of items instead of using them one by one. For example, if you have 100 essences of luck, you have to doubleclick that stack 100 times to use all of them (you can get 8 essences from glob of ectoplasm easily, so they add up quickly).

How about I right-clicked that stack and “use all” option would appear there (so far, only “use” and “destroy” options are there)? After clicking that, warning window could appear (“Do you really want to use <ammount> <object name>?” ).

This would really help with essences of luck and drinking karma.

Also, you could do the same for buying – buy a stack ( or better, buy an ammount you choose). I still remember buying 250 koi cakes during dragon bash one by one or buying 500 obsidian shards at Balthazar temple one by one (my poor left mouse button :-/ ).

Yes please. This should be a relatively easy addition.