RPGMemes
Humor, jokes, memes about TTRPGs
Mindflayers are definitly evil (from humanoid perstective) because of their species. They eat and bread brains. And they are interesting.
I tried to run a goblin sympathy campaign and they just did genocide so
Deekin is a great example of how an evil species (Lawful Evil Kobold) can make a great narrative.
I don't think you necessarily need to have a whole species be one alignment for it.
Just having the culture of a specific community aligned a certain way (ideally with a reason) is more interesting than "all x do bad stuff because they're bad and they like badness."
Your game, your rules. That's the beauty of it. I make everything up as I go along.
Dragons are interesting as a species... They're also in the name of the game. You remove them and the game is just "Dungeons And."