This idea comes from music playlists, as the title suggests. Clicking the three dots next to download on a mod's page would let you add it to a "Playlist" full of other mods you added, these playlists would have the ability to be named and have images, kinda like a profile, but this would have more applications. For example, there could be a default playlist called favorites where it'd mark the mod in the mod browser with a little golden star to indicate it is a favorited mod. The difference between this and a profile is that you could put multiple different mod loaders and versions of the game's mods on it, and it could have features such as adding all applicable mods to a profile, and having stuff like shaders or resource packs, and link/code sharing just like an ordinary profile. You could also add collaborative playlists, meaning people you give access to could add content too, and it'd sync across every owner's playlist.