I know this has been suggested before but the topic was closed a few months ago and I wanted to add my opinion.
I'd like to see Macros being able to be tied to a token and accessed from a right click context menu.
I've been setting up for my first Roll20 campaign and despite the fact we haven't played a proper session yet while testing out the software I was getting irritated at how to access macros,
Trying to access the macros section in settings means you have to click away from the chat pane which means you're likely to miss either rolls or messages (especially given how much screen space the rolls take up) and its just a hassle of having to change to a new menu then go hunting for the roll you want to make then switch back to see what the result is then switch again because you may need to roll a second attack (or secondary effect) or damage).The macro bar is a little better but only if you aren't using many macros, if you're the sort of player that macros every single skill, save and ability (and some of mine are) then you quickly run past the point where you can see all your macros on the screen at once and have to start scrolling to hunt down the one you're looking for (do you want to power attack, charge and power attack, overhand chop, not to mention a caster who macros every single one of his spells), similarly any GM who has multiple enemies or several encounters on the same map is going to generate huge lists of macros.
Similarly with the monster/NPC sheets, sometimes they're just not important enough to create whole journal sheets for them so there's no character sheet to open and access and if they are you still have to switch away from the chat pane in order to access them.
So I would very much like to see the ability not just to access a list of macros from a right click menu on an individual token but also the ability to organise them in folders which would open sub menus when you hover over them.
I think somebody suggested possibly a pop out window for macros but I would personally dislike the idea as that still suffers from a lot of the problems that the current system has, it gives you access to a lot more information than you actually need at any given time and you have to search through for the one button you're actually looking for and you'd either have to keep opening and closing the window manually or leave it somewhere taking up valuable screen space while a context manu appears and disappears when you need it and an organised one makes it much easier to find the specific macro you're looking for.