I appreciate your sentiment and your art in general for sticking to the original art-style so much. I definitely prefer the Jack-Black-ish ruggish Sans. I also just generally disdain bland bishie art/"humanizations" of characters which are really more like cosplays than anything else. I prefer keeping somewhat of the original style and design in mind when doing my own fan art/renditions of characters.

However, if I may throw my hat into the ring, you come off as having a bit of a bias.

You clearly factor a lot of a character’s original designs and color scheme into your renditions (I like doing that too) and for that your logic is Sans = grubby Jack Black looking weirdo, Toriel = pale platinum blonde woman, ect. That’s fine but that’s also just the manor by which you happen to make your fan art.

People use fan art differently, sometimes it’s to experiment with styles, sometimes it’s to illustrate their idea for stories or redesign things, sometimes it’s just to draw something they like in their style. The argument of “character has to/can’t look this way because it’s closer to the original design” kinda falls apart when not everyone is trying to be super accurate to the original as much and have their own rules of drawing fan art. My humanization of Jack Skellington, for instance, is albino but if someone made a Muslim Jack or Asian Jack I wouldn’t think they’re just trying to gain sympathy points – maybe they just want to feel included– and that’s fine. Even though I prefer my human Jack being pale with white to match his original design, if an artist is good enough with their fan art and their design, they can sell me on anything. I like fan art which looks like it was drawn by the creator themselves to art which is so different and all manor of interpretations in between.

Point being, I get what you’re trying to say, but I think it’s a little closed minded to say different depictions of non-human characters are just people purposefully muddying a character based on their libido or need for attention.

IDK, this topic is kind icky when stacked alongside the bishi-izations I mentioned earlier...

Fan art is for everyone and to be used anyway you want, and that unfortunately means bad tropes in designing spread fast. So you get bland gijinkas calling themselves “humanizations” and pretty-faced Forever21 renderings of characters who aren’t supposed to be traditionally pretty (Rugrats) popping up. I could let that slide if there wasn’t such an acceptance among fandoms about this type of fan art being the norm. I think its that it’s usually the first stuff to be drawn and/or get any attention and so it spreads throughout the fandom, and the way X character is supposed to look based on this one design is just accepted and copied by other artists who don’t really want to devote a lot of time to designing their own version.

Sorry if I sounded rude at any point here. I’m fine if you disagree but I couldn’t help but add my thoughts a little, as humanization is something I devote a lot of unnecessary time to.