Out of everyone I've introduced for now...
I can say for sure that I'd reincarnate as anything that is specifically not a fantasy creatures, that's a no-no too.
Becoming one of the godly Stars could be interesting... but too many problems.
In a similar fashion, I could become one of my Returnees, one of the Apostles of the Stars.
The courageous Pierre Coeur de Lion, or become a shield as Leo the SpearFlame...
Or become a bald guy who punches stuff, like Buster.
But then again too many responsibilities.
Fighting for scraps of food in empty space might be a tad frustrating. Ain't going to become part of The Horde.
...
Or maybe I would ? As Hyperion, The Dark Star ? That would be interesting.