The main use of bookmark is to recall a Focus search and apply it dynamically to the current library. I don’t think a default name would work well here at all. The user is the best person to name their Focus search because they know what it means for them.
I’m afraid I’m with @andybob. I don’t think this is really the best way to use Bookmarks.
Regarding “albums, tracks etc. to re-visit” (an important usage), I have about 40 items marked as “Listen To Me” in a Tag. I can focus on this through a single Bookmark. To me that’s a more elegant way than having 40 Bookmarks, one for each item…