It just occurred to me one of the reasons I like Not A Villain so much.
It's because my most ambitious webcomic idea of all time which to this day I would love to make but know I could never make had a loose parallel to it--the idea of three separate art styles for three separate settings. The seventh webcomic I ever made, which I called SciFanTerra, focused on a guy living out an every-day just-recently-graduated-college life (which was meant to have a somewhat-realistic cartoonish style), pulled into a fantasy setting with magic and whatnot where he was declared The Chosen One (with a more animesque art style and where he is de-aged to appear to be a teenager), and who after returning home is selected to help in intergalactic affairs (in stick figure style), and it had loads and loads and LOADS of characters with an intricate balance between magic and technology and lots of worldbuilding and rules and whatnot and remains one of my favorite ideas ever even though I know I can never make it.
Not A Villain differentiates its three different areas with three different art styles, and I just now remembered why that was so appealing to me; it's because years ago (we're talking, somewhere in the 2008-2010 range), I had the exact same sort of idea.
Funny how things work like that.