What is the Blogging from A to Z challenge and where can I find more participants? Right here.
Yes, if we're being official we'd call them Antagonists, but we covered A.
We agonize over our protagonist, making sure readers like them, that they have good motivations, and that their character arc is sound. Don't neglect to do the same for you bad guys (This is killing me, can we just call them antagonists and pretend we're going with B? Yes, I think we can.)
Having a well rounded antagonist can really set the story apart and make your protagonist shine even brighter. There is definitely something to having a worthy opponent. One of my favorite conundrums is realizing that the antagonist has a valid point and motivation, but is only in the wrong because we're steered toward cheering for the protagonist. Seeing both sides of the conflict makes for a rich story.
Take the time to get to know your antagonist and give them a solid soap box to stand on while they set forth in their quest for world domination. Your story will thank you for it.
Have you ever read a story and found yourself liking the antagonist more than the protagonist?