I have created a provisional collection of #art friends. If you are not on this list and believe you ought to be, please let me know. It's possible that I tried to add you and was unable due to your settings.
Not entirely sure why Mastodon needs lists, collections, and "featured profiles" pinned to your profile. You know what would be cooler than a collection of profiles? A collection of specific posts, so artists could make galleries.
Sort of like pinned posts, but on a separate linkable page. Artist galleries, posts about a specific topic (like an ongoing project), that sort of thing. Similar to what you can do with tagging, but more deliberate.