This is a personal thing but I have to get it off my chest. Most fangans have bad character design that prioritizes emulating Komatsuzaki Ruis style over anything else.
Often times fangan designs look worse because the lighting for them is flat, there's no unified color palettes between characters. The cast often looks like they were designed separately from each other and lack cohesion. I think a lot of the designs would look better if the artist drew them in their own art style.
remind me of v-tubers in that they're overdesigned, it feels like every character wants to be the main character. (Funny because most of Drs main characters are pretty basic) A lot of Drs designs can actually pretty basic when you break them down, even if a character is overdesigned there's still often a silhouette or shape to latch onto, look at how many people simplify Junkos design.
As for fangan character designs I personally like:
Super Danganronpa another 2, Danganronpa 4k, Edens Garden, Konran:Zanki, Kill cure, danganronpa rebirth, I've seen very little from danganronpa "rest in peace" but everything I have seen is amazing.
Again this is just a personal ick not an objective judgement of character design/appeal. I also understand that these projects are free so I don't expect professional level quality, and if the product is free then the artist should be able to add as many bells and whistles as they want! They have a right to make their sparkle dogs and I genuinely don't want to shame anyone for enjoying these designs. However this has been eating away at me and I needed to get this off my chest.