What are your favorite and least favorite characters who are best known for going through a body transformed by science or magic? Are they a were-something or a super-powered form or a man-something?

What are some memorable occasions where an established character was transformed? Were they just gimmicks or did they manage to be good or fun stories? 

What are your favorite ways that characters transformed?

Last week, we conversed about body swaps.

Next week, we’ll converse about shapeshifters and masters of disguise.