I don't know why this is, but somehow seeing an upbeat image with FNAF characters just gives me good feelings, like the feeling that you were in a hot room and suddenly the fan has been turned on to just the right level. Now, obviously that's not a bad thing! But somehow you're one of the artists who are particularly good at it, and not to mention you're able to do it without brightly colored backgrounds or expressions that exceed the bounds of the character models. Plus, the relatively cool temperature of the colors adds to a very inviting feel to all this. It makes it so easy to just overlook the whole robot aspect of it, and the addition of very human-looking expressions, particularly with your Chica model, and especially within the confines of the character models just makes it more relatable. And that's saying something, considering these characters came from a game where said characters are actively trying to kill the player character, and definitely gave me a few nightmares and a few sleepless nights. Now maybe that's just the fan in me, but that's no small accomplishment.