Rick and morty, cause Rick and morty

Depending on the games and who your talkin to XD

In the fandom? Id assume bowser Yoshi, anything fnaf. renamen, Krystal fox, unfortunately most of the undertale characters ^^; These are still recent cause I always see em still. Most of the newer pokemon ^^;

I just wanted to add to your list:
Sonic and MLP. Posting good art of either Cannon or fancharacters net me a lot more attention than anything else I post. Not complaining, I think it's kinda funny. But, a thing to note, nonetheless.

if you want to draw/commission porn:
Pokemon , digimon , zootopia , starfox , yoshi/browser , jurasic world/ark survival

If you dont want to draw porn(hopefuly)
Undetale , rick and morty

Good series not furry but are amazing
-Black mirror
-the expanse

I'd say lately the characters from the Night In the Woods game.