SDP80 and EnderWiggin - great ideas. Unfortunately I guess I've tried to edit my OP way too many times, so I can't add to the original list anymore (LOL), but I know Larian is trying to read every post anyway.

So the whole "left-click to pickup items instead of drag" thing is at the very top of the OP, since I also think it would be a very simple and huge player convenience fix. As for my original suggestion of a junk bag, I now think your and others' idea to simply be able to "tag/mark" items for later quick sale would be a little easier for Larian to implement. That said, this should also be done in conjunction with my "Items should be consistently arranged/ordered in all inventory/trading grids/windows" suggestion - it may seem nitpicky to some, but the current implementation is incredibly annoying: I try to keep stuff I want to sell (or don't want to sell, like hotkeyed items) together in one part of the inventory grid, but the random resorting for the trading screen means I have to hunt through dozens of items and pick out each thing to sell one by one.

As to switching between characters in the barter screen, since the arrows are there, I assume it's already planned but just not working yet. But I agree we really need that in the final version.

Anyway, keep the ideas coming - these sorts of changes/fixes are relatively simple (compared to the other huge things Larian has been doing with gameplay), but really allow players to spend less time on the boring stuff - inventory management etc. - and more time enjoying the game.