Marvel has a LOT of characters.
And unless you've got a really impressive memory... it's kind of hard to know EVERY THING about EVERY SINGLE ONE. But the good news is our community is really knowledgeable! Whenever I'm confused I like to crowd source my question because I trust my friends to direct me to good comics or resources.
What characters out there do you wish you knew more about? I'm sure there's someone in the community that knows a lot about them! One person's obscure character is another person's absolute fave.