In Garry's Mod, I've subscribed to a whole bunch of addons from the Steam Workshop.
Naturally, if it was a few addons - I would just leave it running (since it would take only a minute or two to download).
However, I've subscribed to about 50 new [undownloaded] addons. Is there any way to prioritize which addons to download first or just pick (choose what to download) from a list of [all the addons you've subscribed to that haven't been downloaded/need updates] just like in the Source Filmmaker?
A 'don't bother downloading [this] addon and skip to the next one on the list' command/button is good enough.
EDIT: I've noticed that some addons are downloaded through the Steam client, while others are through the game itself (if it has assets, such as prop models or textures) from other addons or installed Source-powered games etc.)