This topic goes to the heroes and villains who, despite not being as popular or recognizable as others, still hold a place in your heart for some reason or another. This list is ONLY for heroes and villains that you feel are unappreciated, NOT for the ones who are already known even by non-comic book readers.
To start off, this guy is my favorite underrated villain:
The Clock King, pictured above, is just hilarious. How can you not like the guy? He calls himself a king of clocks, of all things, wears a clock mask and clock one-piece, and commits clock-themed crimes. I love how inept he is, which at the same time makes him very endearing. You know the Joker will get his way eventually, but I always want to root for Clock King to somehow defeat Batman, just once. He's actually one of my favorite Batman villains, next to Clayface.
To start off, this guy is my favorite underrated villain:

The Clock King, pictured above, is just hilarious. How can you not like the guy? He calls himself a king of clocks, of all things, wears a clock mask and clock one-piece, and commits clock-themed crimes. I love how inept he is, which at the same time makes him very endearing. You know the Joker will get his way eventually, but I always want to root for Clock King to somehow defeat Batman, just once. He's actually one of my favorite Batman villains, next to Clayface.