Guild Wars 2

what i really would like to see is an action bar players can place somewhere on the interface (it could be small, and placed above the skillbar, or on the left/right side of the screen). It does not have to be big, or contain many places.

But there is buff-food, tonics and a variety of consumables, and also emotes. For those things, an action bar would be perfect. So it would not be a problem if you can not drag weapons in it or something.

this is how it would work:
you can link up to XX items from your inventory to that action bar: miniatures, tonics, food, but you can link also actions such as emotes or toggle town clothing. Then, you can click on the button of the action bar, and the item is used, the action performed.

what is it good for?
simple, to use consumables you prefer easy with 1 click. Then, to perform emotes without having to type in something (for example you want to /wave at a player you just met in an event, or you want to /sit down fast. or for roleplayers to perform their most used emotes faster and without disrupting the chat-flow).

but we want to look on the game not the interface!
Yes, for sure. But you could make the icons small, similar to the options/tradingpost/guild and so far bar above.