Over at Seven Hells, Devon (who erreth not) has started an interesting conversation about "permanent guest-stars", characters whose role is to show and be 'familiar' in other people's books and stories but aren't central characters themselves.
This hits close to home; my own "Dynastic Centerpiece" model is about how to move Column B heroes into Column A so they might support their own books. Devon asks whether those in Column C should remain there on purpose.
In honor of this topic, own new polls asks,
"Who is your favorite (male hero) permanent guest star?"