Since people are pretty selective about their fetishes I think it's going to be pretty hard to incorporate stuff with growth that's not going to invoke some kind of nerd rage.
I'm personally a fan of futa, hourglass transformations, and butt/lip inflation. I love it when stories deal with issues like jealousy fueling growth, or sexual frustration causing it. I'd also like to see a young couple grow together, like in
Big Nymphomaniac. I'd also like to see stories that pick out situations I can fantasize myself into like girls camming or growing in class. I like the way artists like Hardblush show characters with some personality. Comics with goth, industrial, scene, and hipster boys and girls help me fantasize myself into them, mostly because that's who I date and that's who I'm attracted to. I'd like to see growth comics take some risks and make some characters that have more going on than being a generic canvas to paint a fetish onto.